Exhibit 10.54
                             SECURED PROMISSORY NOTE
                                     752834

$6,200,000.00                                                    March 16, 2001


1. FOR VALUE  RECEIVED,  NEW BRIGHTON  BUSINESS  CENTER LLC, a Delaware  limited
liability company,  as "Borrower"  ("Borrower" to be construed as "Borrowers" if
the context so requires),  hereby promises to pay to the order of PRINCIPAL LIFE
INSURANCE COMPANY,  an Iowa corporation (as "Lender"),  having a principal place
of business and post office address at c/o Principal  Capital  Management,  LLC,
801 Grand Avenue, Des Moines, Iowa 50392-1450,  or at such other place as Lender
may designate,  the principal sum of Six Million Two Hundred Thousand and 00/100
Dollars  ($6,200,000.00)  (the "Loan  Amount") or so much  thereof as shall from
time to time have been advanced, together with interest on the unpaid balance of
said sum from  March 16,  2001 (the  "Closing  Date"),  at the rate of Seven and
Twenty-three one hundredths percent (7.23%) per annum.

         A payment of interest from the Closing Date to and including  March 31,
2001 shall be paid on the Closing  Date  calculated  by  multiplying  the actual
number of days elapsed in the period for which interest is being calculated by a
daily rate  based on the  foregoing  annual  interest  rate and a 360-day  year.
Thereafter,  interest  shall be computed on the unpaid balance on the basis of a
360-day  year  composed  of twelve  30-day  months.  Beginning  on May 1,  2001,
principal and interest shall be due and payable in  installments  of Forty Eight
Thousand  Nine Hundred  Twenty-eight  Dollars and 21/100  ($48,928.21),  with an
installment  in a like  amount  due and  payable  on the same day of each  month
thereafter  continuing  to and  including  April 1, 2006.  Lender shall have the
right to declare  this Note to be due and payable in full on the Call Date or to
adjust the per annum  interest rate on the Rate  Adjustment  Date to an interest
rate established by Lender ("Adjusted Interest Rate") as herein provided. In the
event Lender elects to declare this Note to be due and payable,  this Note shall
become due and payable,  in full,  without a Make Whole Premium on April 1, 2006
("Call Date").  In the event Lender elects to adjust the interest rate,  then on
March 1, 2006  ("Rate  Adjustment  Date") the per annum  interest  rate shall be
adjusted to the Adjusted Interest Rate and commencing on April 1, 2006,  monthly
installments  of principal  and  interest  shall be due and payable in an amount
determined by amortizing the then principal  balance of this Note over a 15-year
term at the Adjusted  Interest  Rate, and a like amount shall be due and payable
on the same day of each month  thereafter,  until said  principal  and  interest
shall be paid, except that all remaining principal and interest shall be due and
payable on April 1, 2011 or such earlier date resulting from acceleration of the
Indebtedness by Lender  ("Maturity  Date").  Each installment  shall be credited
first upon interest then accrued and the remainder upon principal,  and interest
shall cease to accrue upon  principal so credited.  All  principal  and interest
shall be paid in lawful  money of the United  States of  America,  by  automated
clearing house transfer  through such bank or financial  institution as shall be
approved in writing by Lender, shall be made to an account designated by Lender,
and shall be initiated by Lender or shall be made in such other manner as Lender
may direct from time to time.


         Lender shall notify Borrower in writing ("Lender's Election Notice") on
or before  February 1, 2006 of Lender's  election to adjust the interest rate or
of Lender's intention to declare this Note to be due and payable in full. In the
event Lender elects to adjust the interest rate,  Lender's  Election Notice will
contain the number of basis points  ("Spread")  and the United  States  Treasury
Issue  ("Treasury  Issue") that Lender  anticipates it will use to establish the
Adjusted  Interest  Rate.  The Spread shall be  determined by Lender in its sole
discretion  based on  Lender's  evaluation  of: (i) the then  current  financial
performance and projected risk of the Premises,  which shall  encompass  various
factors,   including  but  not  limited  to  contract  debt  service   coverage,
loan-to-value  ratio,  economic debt service coverage,  occupancy,  frequency of
tenant  rollover,  financial  strength and  stability of tenants;  (ii) the then
current financial status of Borrower,  which shall include but not be limited to
creditworthiness,  financial  strength,  percentage  of  liabilities  to  liquid
assets,  and  annual  net  income;  and (iii)  the  remaining  term and  current
outstanding balance of the Note.


         At any time and from time to time before the Adjusted  Interest Rate is
established,  provided at least seven (7) days have  elapsed  since the previous
Lender's  Election  Notice,  Lender  may  establish  a new Spread  which  Lender
anticipates  it will use to  establish  the  Adjusted  Interest  Rate and notify
Borrower of the same.  Within thirty (30) days of the initial Lender's  Election
Notice,  the  Adjusted  Interest  Rate must be  established  by  mutual  written
agreement  of  Lender  and  Borrower.  The  Adjusted  Interest  Rate may only be
established by mutual written  agreement of Lender and Borrower and simultaneous
payment by Borrower of Fifteen Thousand and 00/100 Dollars  ($15,000.00)  ("Rate
Adjustment Fee"). In the event: (i) Lender notifies Borrower of its intention to
declare  this Note to be due and payable in full,  (ii) Lender and  Borrower are
unable for any reason to mutually agree in writing on the Adjusted Interest Rate
within thirty days after the initial Lender's Election Notice; or (iii) Borrower
fails to pay the Rate  Adjustment Fee to Lender when due, this Note shall become
due and payable in full, on the Call Date, without a Make Whole Premium, and all
principal,  interest  accrued or to accrue to the date of prepayment at the rate
in effect at the time of the initial  Lender's  Election  Notice,  and all other
Indebtedness shall become  immediately due and payable in full.  Notwithstanding
any other provision herein, Lender shall not be obligated to adjust the interest
rate if any default exists under this Note or the Loan Documents.

         In the event Borrower accepts the Adjusted  Interest Rate,  Borrower is
required to provide Lender the following:

          (i) a  new  ALTA  standard  loan  title  policy  for  the  Loan  or an
     endorsement  updating  said title  policy in the full amount of the Loan in
     form  and by an  issuer  satisfactory  to  Lender  at the  time of the rate
     adjustment  unless (x) the  outstanding  balance of the Loan at the time of
     the Call Date is less  than  $20,000,000.00,  (y) no liens or  encumbrances
     exist against the Premises  except as previously  approved by Lender in the
     Mortgage, and (z) no mortgages or deeds of trust exist against the Premises
     except for the  Mortgage.  Borrower  further  agrees that the policy  shall
     insure Lender's  Mortgage,  at the Adjusted Interest Rate to be a first and



     prior lien subject only to those exceptions which were previously  approved
     by Lender and provide coverage against mechanic's liens;

          (ii) an amendment to the Note in form and  substance  satisfactory  to
     Lender  executed by Borrower  evidencing  the Adjusted  Interest Rate and a
     representation   that  the  Premises  is  free  and  clear  of  any  liens,
     privileges,  mortgages or encumbrances except as expressly permitted in the
     Mortgage;

          (iii) a usury opinion or endorsement to the title policy acceptable to
     Lender if Lender reasonably  believes that the Adjusted Interest Rate is or
     may be usurious; and

          (iv) a  title  search  acceptable  to  Lender  and  reimbursement  for
     Lender's costs incurred in obtaining the same.

2. No  privilege  is reserved by Borrower to prepay any  principal  of this Note
prior to the Maturity  Date,  except on or after the date  hereof,  privilege is
reserved,  after giving  thirty (30) days' prior  written  notice to Lender,  to
prepay in full,  but not in part,  all  principal  and  interest  to the date of
payment,  along  with all sums,  amounts,  advances,  or  charges  due under any
instrument  or  agreement  by which this Note is secured,  upon the payment of a
"Make Whole Premium." The Make Whole Premium shall be the greater of one percent
(1%) of the principal  amount to be prepaid or a premium  calculated as provided
in subparagraphs (a) through (c) below:

          (a) Determine the "Reinvestment Yield." The Reinvestment Yield will be
     equal  to the  yield  on the  applicable*  U.S.  Treasury  Issue  ("Primary
     Issue")**  published one week prior to the date of prepayment and converted
     to an equivalent monthly compounded nominal yield.

     **In the event there is no market  activity  involving the Primary Issue at
     the time of  prepayment,  Lender shall choose a comparable  Treasury  Bond,
     Note or Bill  ("Secondary  Issue")  which  Lender  reasonably  deems  to be
     similar to the Primary Issue's  characteristics (i.e., rate, remaining time
     to maturity, yield).

          (b) Calculate the "Present  Value of the  Mortgage." The Present Value
     of the  Mortgage  is the  present  value  of the  payments  to be  made  in
     accordance  with this  Note (all  installment  payments  and any  remaining
     payment due on the Call Date,  or if the Call Date has already  passed,  on
     the Maturity Date) discounted at the  Reinvestment  Yield for the number of
     months  remaining  from the date of  prepayment to the Call Date, or if the
     Call Date has already passed, to the Maturity Date.


          (c) Subtract the amount of the prepaid proceeds from the Present Value
     of the  Mortgage  as of the  date of  prepayment.  Any  resulting  positive
     differential shall be the premium.

          As set  forth  above,  the U.S.  Treasury  Issue  applicable  for each
prepayment period is as follows:

          Prepayment Period                           U.S. Treasury Issue

          To March 1, 2006                                    *
          March 1, 2006 to March 1, 2011                      *

         *At this time there is not a U.S.  Treasury  Issue for this  prepayment
         period. At the time of prepayment,  Lender shall select in its sole and
         absolute  discretion a U.S.  Treasury Issue with similar remaining time
         to the end of the applicable prepayment period.

3.  Borrower  agrees  that if  Lender  accelerates  the whole or any part of the
principal  sum  evidenced  hereby,  or  applies  any  proceeds  pursuant  to the
provisions  of the Loan  Documents,  Borrower  waives  any right to prepay  said
principal  sum in whole or in part  without  premium and agrees to pay, as yield
maintenance protection and not as a penalty, the Make Whole Premium.

4.  If any  payment  of  principal,  interest,  Make  Whole  Premium,  or  other
Indebtedness is not made when due, damages will be incurred by Lender, including
additional  expense  in  handling  overdue  payments,  the  amount  of  which is
difficult and impractical to ascertain.  Borrower  therefore agrees to pay, upon
demand,  the sum of four cents  ($.04) for each one dollar  ($1.00) of each said
payment which becomes  overdue ("Late  Charge") as a reasonable  estimate of the
amount of said  damages,  subject,  however,  to the  limitations  contained  in
paragraph 6 hereof.

5. If any  Event of  Default  has  occurred  and is  continuing  under  the Loan
Documents,  the entire principal balance of the Loan, interest then accrued, and
Make Whole  Premium,  and all other  Indebtedness  whether or not otherwise then
due, shall at the option of Lender,  become  immediately due and payable without
demand or notice, and whether or not Lender has exercised said option,  interest
shall accrue on the entire principal balance,  interest then accrued, Make Whole
Premium and any other Indebtedness then due, at a rate equal to the Default Rate
until fully paid.

6. Notwithstanding  anything herein or in any of the other Loan Documents to the
contrary,  no provision  contained  herein or therein which purports to obligate
Borrower to pay any amount of interest or any fees,  costs or expenses which are
in excess of the maximum  permitted by applicable law, shall be effective to the
extent it calls for the  payment of any  interest  or other  amount in excess of
such maximum.  All agreements between Borrower and Lender,  whether now existing



or hereafter  arising and whether written or oral, are hereby limited so that in
no  contingency,  whether by reason of demand for payment or acceleration of the
maturity  hereof or otherwise,  shall the interest  contracted  for,  charged or
received by Lender exceed the maximum amount  permissible  under applicable law.
If, from any  circumstance  whatsoever,  interest would  otherwise be payable to
Lender in excess of the maximum  lawful amount,  the interest  payable to Lender
shall be reduced to the maximum amount  permitted  under  applicable law; and if
from any  circumstance  Lender  shall  ever  receive  anything  of value  deemed
interest by applicable  law in excess of the maximum  lawful  amount,  an amount
equal to any excessive  interest shall, at the option of Lender,  be refunded to
Borrower or be applied to the reduction of the  principal  hereof and not to the
payment of interest or, if such excessive interest exceeds the unpaid balance of
principal hereof such excess shall be refunded to Borrower. This paragraph shall
control all agreements between Borrower and Lender.

7.  Borrower and any  endorsers or  guarantors  waive  presentment,  protest and
demand,  notice of protest,  demand and dishonor and  nonpayment,  and agree the
Maturity Date of this Note or any installment may be extended without  affecting
any liability  hereunder,  and further  promise to pay all reasonable  costs and
expenses,  including but not limited to,  attorney's  fees incurred by Lender in
connection with any default or in any proceeding to interpret and/or enforce any
provision of the Loan Documents. No release of Borrower from liability hereunder
shall release any other maker, endorser or guarantor hereof.

8. This Note is secured by the Loan Documents  creating among other things legal
and valid encumbrances on and an assignment of all of Borrower's interest in any
Leases of the  Premises  located in the county of  Ramsey,  state of  Minnesota.
Capitalized  terms  used  herein  and not  otherwise  defined  shall  have those
meanings given to them in the Loan  Documents.  In no event shall such documents
be construed inconsistently with the terms of this Note, and in the event of any
discrepancy  between any such  documents  and this Note,  the terms hereof shall
govern.  The  proceeds  of this  Note are to be used for  business,  commercial,
investment or other similar  purposes,  and no portion  thereof will be used for
any  personal,  family or  household  use.  This Note shall be  governed  by and
construed  in  accordance  with the laws of the  State  where  the  Premises  is
located, without regard to its conflict of law principles.

9.  Notwithstanding  any  provision  to the  contrary  in this  Note or the Loan
Documents and except as otherwise  provided for below, the liability of Borrower
and any general partner of Borrower under the Loan Documents shall be limited to
the interest of Borrower and any general partner of Borrower in the Premises and
the  Rents.  In the  event of  foreclosure  of the liens  evidenced  by the Loan
Documents, no judgment for any deficiency upon the Indebtedness evidenced by the
Loan  Documents  shall be sought or obtained by Lender  against  Borrower or any
general partner of Borrower.  Nothing herein shall in any manner limit or impair
(i) the lien or enforcement of the Loan Documents  pursuant to the terms thereof
or (ii) the obligations of any indemnitor or guarantor, if any.


         Notwithstanding any provision hereinabove to the contrary, Borrower and
any general partner of Borrower shall be personally liable to Lender for:

         (a)      any loss or  damage  to  Lender  arising  from (i) the sale or
                  forfeiture of the Premises  resulting from Borrower's  failure
                  to pay any of the taxes,  assessments or charges  specified in
                  the Loan  Documents or (ii)  Borrower's  failure to insure the
                  Premises  in  compliance  with  the  provisions  of  the  Loan
                  Documents;

         (b)      any event or circumstance for which Borrower indemnifies
                  Lender under the Environmental Indemnity;

         (c)      nonpayment of taxes, assessments, insurance premiums and
                  utilities for the Premises and any penalty or late charge
                  associated with nonpayment thereof;

         (d)      failure to manage, operate, and maintain the Premises in a
                  commercially reasonable manner for similar property types in
                  the surrounding geographic area;

         (e)      any sums expended by Lender in fulfilling  the  obligations of
                  Borrower as lessor under any Lease of the Premises  prior to a
                  sale of the Premises pursuant to foreclosure or power of sale,
                  a bona fide sale  (permitted by the terms of paragraph 2(f) of
                  the  Mortgage  or  consented  to in  writing  by Lender) to an
                  unrelated  third  party or upon  conveyance  to  Lender of the
                  Premises  by a deed  acceptable  to Lender in form and content
                  (each of which shall be  referred to as a "Sale" for  purposes
                  of this  paragraph)  or expended by Lender after a Sale of the
                  Premises for  obligations  of Borrower  which arose prior to a
                  Sale of the Premises;

                  Borrower's  personal liability for items specified in (c), (d)
                  and (e) above shall be limited to the amount of rents, issues,
                  proceeds and profits from the Premises  ("Rents and  Profits")
                  received by Borrower for the twenty-four (24) months preceding
                  an Event of Default  and  thereafter;  but less any such Rents
                  and Profits applied to (A) payment of principal,  interest and
                  other  charges  when  due  under  the Loan  Documents,  or (B)
                  payment of expenses  for the  operation,  maintenance,  taxes,
                  assessments,  utility  charges and  insurance  of the Premises
                  including  sufficient reserves for the same or replacements or
                  renewals thereof  ("Operation  Expense(s)")  provided that (x)
                  Borrower has furnished  Lender with evidence  satisfactory  to
                  Lender of the Operation Expenses and payment thereof,  and (y)
                  any  payments  to  parties   related  to  Borrower   shall  be
                  considered  an  Operation  Expense only to the extent that the
                  amount expended for the Operation  Expense does not exceed the
                  market rate for such Operation Expense.


          (f) any rents or other income  regardless of type or source of payment
     or other  considerations  in lieu thereof  (including,  but not limited to,
     common area maintenance charges, lease termination payments, refunds of any
     type,  prepayment of rents,  settlements of  litigation,  or settlements of
     past due rents)  from the  Premises  which  Borrower  has  received or will
     receive  after an Event of Default under the Loan  Documents  which are not
     applied to (A) payment of  principal,  interest and other  charges when due
     under the Loan Documents or (B) payment of Operation Expenses provided that
     (x) Borrower has furnished  Lender with evidence  satisfactory to Lender of
     the Operation Expenses and payment thereof, and (y) any payments to parties
     related to Borrower  shall be considered  an Operation  Expense only to the
     extent that the amount  expended for the Operation  Expense does not exceed
     the market rate for such Operation Expense;

         (g)      any security  deposits of tenants,  together with any interest
                  on such security deposits  required by law or the leases,  not
                  turned  over to Lender  upon  conveyance  of the  Premises  to
                  Lender  pursuant to  foreclosure or power of sale or by a deed
                  acceptable to Lender in form and content;

         (h)      misapplication  or  misappropriation  of tax reserve accounts,
                  tenant  improvement   reserve  accounts,   security  deposits,
                  prepaid  rents  or  other  similar  sums  paid  to or  held by
                  Borrower or any other entity or person in connection  with the
                  operation of the Premises;

          (i) any insurance or  condemnation  proceeds or other similar funds or
     payments  applied by Borrower in a manner other than as expressly  provided
     in the Loan Documents; and

         (j)      any loss or damage to Lender arising from any fraud or willful
                  misrepresentation by or on behalf of Borrower,  Interest Owner
                  or  any  guarantor  regarding  the  Premises,  the  making  or
                  delivery of any of the Loan  Documents or in any  materials or
                  information  provided  by or on behalf of  Borrower,  Interest
                  Owner or any guarantor in connection with the Loan.

                  Notwithstanding  anything  contained in paragraphs 9(a)(i) and
                  9(c)  hereinabove as it relates  solely to taxes,  assessments
                  and insurance premiums, to the extent Lender is impounding for
                  taxes,  assessments and insurance  premiums in accordance with
                  the Loan  Documents  and Borrower has fully  complied with all
                  terms  and  conditions  of  the  Loan  Documents  relating  to
                  impounding for the same, then Borrower shall not be personally
                  liable  for  Lender's  failure  to apply  any of said  impound
                  amounts held by Lender in accordance with the Loan Documents.


         Notwithstanding  anything to the  contrary in the Loan  Documents,  the
limitation  on liability  contained in the first  paragraph of this  paragraph 9
SHALL  BECOME  NULL AND VOID and shall be of no further  force and effect in the
event:

         (w)      of any breach or violation  of paragraph  2(f) (due on sale or
                  encumbrance)  of the Mortgage,  other than (i) the filing of a
                  nonmaterial  mechanic's  lien  affecting  the  Premises  or  a
                  mechanic's  lien affecting the Premises for which Borrower has
                  complied  with  the   provisions  of  paragraph  1(e)  of  the
                  Mortgage,  or  (ii)  the  granting  of any  utility  or  other
                  nonmaterial  easement or servitude burdening the Premises,  or
                  (iii) any transfer or  encumbrance  of a nonmaterial  economic
                  interest in the  Premises  not  otherwise  set forth in (i) or
                  (ii); or

         (x)      of any filing by  Borrower  of a  petition  in  bankruptcy  or
                  insolvency or a petition or answer seeking any reorganization,
                  arrangement,    composition,    readjustment,     liquidation,
                  dissolution or similar relief under the Bankruptcy laws of the
                  United States or under any other applicable federal,  state or
                  other statute or law.

10. If more than one,  all  obligations  and  agreements  of Borrower and of any
general partners of Borrower are joint and several.

11. This Note may not be changed or terminated  orally, but only by an agreement
in writing  and signed by the party  against  whom  enforcement  of any  waiver,
change,  modification or discharge is sought. All of the rights,  privileges and
obligations  hereunder  shall inure to the benefit of the heirs,  successors and
assigns of Lender and shall bind the heirs and permitted  successors and assigns
of Borrower.

12. If any provision of this Note shall,  for any reason,  be held to be invalid
or unenforceable, such invalidity or unenforceability shall not affect any other
provision  hereof,  but this  Note  shall be  construed  as if such  invalid  or
unenforceable provision had never been contained herein.

13. This Note may be executed in counterparts,  each of which shall be deemed an
original;  and such  counterparts  when taken together shall  constitute but one
agreement.

                            (Signatures on next page)






              NEW BRIGHTON BUSINESS CENTER LLC, a Delaware
              limited liability company



             By    ______________________________
                   Name:
                   Title: