Error when link umat

Hi,

There is a problem when I link umat in abaqus 6.6. Here is the message:

ABAQUS JOB um
ABAQUS Version 6.6-3
Begin Compiling ABAQUS/Standard User Subroutines
07/26/10 09:49:19
End Compiling ABAQUS/Standard User Subroutines
07/26/10 09:49:19
Begin Linking ABAQUS/Standard User Subroutines
07/26/10 09:49:19
LINK : fatal error LNK1181:
ABAQUS Error: Problem during linking - ABAQUS/Standard User Subroutines.
  This error may be due to a mismatch in the ABAQUS user subroutine arguments.
  These arguments sometimes change from release to release, so user subroutines
  used with a previous version of ABAQUS may need to be adjusted.
ABAQUS/Analysis exited with errors

I have checked c++ and fortran complier with verification, which show this list as follow:

Running system requirement checks.

Requirement:    Windows 2000 or Windows XP
Product:        All ABAQUS Products
Status:         Pass - Found Microsoft Windows XP Professional Service Pack
                3 (Build 2600).

Requirement:    Checking system settings to improve performance
Product:        ABAQUS/Explicit
Status:         Warning - You may be able to improve the performance of
                ABAQUS/Explicit on this system.  For details, see ABAQUS
                Online Support System Answer 1436.

Requirement:    Microsoft Visual C++ 7.10.3077.0
Product:        ABAQUS/Make with C++
Status:         Warning - Found Microsoft Visual C++ 8.0.50727.42, which is
                a newer version than the published ABAQUS requirement.  This
                compiler should work with ABAQUS/Make; however, it has not
                been tested with ABAQUS/Make by the time of this ABAQUS
                release.

Requirement:    Intel Fortran 8.1
Product:        ABAQUS/Make with Fortran and ABAQUS/User Subroutines
Status:         Warning - Found Intel Fortran Compiler 9.1 Build 20060323Z.
                This compiler should work with ABAQUS/User Subroutines and
                ABAQUS/Make; however, it has not been tested with
                ABAQUS/User Subroutines and ABAQUS/Make by the time of this
                ABAQUS release.

Requirement:    Internet Explorer 6.0, Netscape 7.0, Mozilla 1.2, Firefox
                1.0.1, or greater
Product:        ABAQUS Documentation
Status:         Pass - Found Internet Explorer 7.0.6000.21228

WARNING: Verification for all selected products will be attempted, but some
         products may fail because of the indicated system deficiencies

I think there should be no errors in code because the umat file I used is from abaqus documentation.

Any ideas?

Thanks

yoyo

I didn't find any reason for this.