errors when accessing from a shedlued DTS SQL package

[Dyckwal]

Problem:
Created a DTS package to get information from a MSAccess Database. We used
an ODBC to get access, and configured it to use the sysem.mdw (Security
file). When we run the DTS package manual (meaning by right click/execute)
the package runs and gets the data.
We then scheduled the the DTS to run once a day. Now when executing this job
we always get the same error.
The user sqlserveragent is a domain administrator who has all the right to
the drive/folder/file where the security and msaccess database are located.

We have tried everything, but cannot find the solution for this problem.

We know it can work because we have done this before, but (unfortunately) we
did not documented it the last time.

Is there someone who can help us..

***************** start of error message ****************

Executed as user: Mydomain\sqlserveragent.
DTSRun: Loading...
DTSRun: Executing...
DTSRun OnStart: DTSStep_DTSExecuteSQLTask_1
DTSRun OnError: DTSStep_DTSExecuteSQLTask_1, Error = -2147467259 (80004005)

Error string: [Microsoft][ODBC Microsoft Access Driver] Cannot start your
application. The workgroup information file is missing or opened exclusively
by another user.
Error source: Microsoft OLE DB Provider for ODBC Drivers
Help file:
Help context: 0
Error Detail Records:
Error: -2147467259 (80004005);
Provider Error: 1901 (76D)
Error string:
Error source:
Help file:
Help context: 0
DTSRun OnFinish: DTSStep_DTSExecuteSQLTask_1
DTSRun: Package execution complete. Process Exit Code 1. The step failed.

***************** end of error message ****************

Version info

MSSQL server version 2000 / SP4
Windows standard server 2003 / SP1

MSAccess version 97
Windows standard server 2000 / SP4