ODBC Connection in W2K

I simply can't connect to Access via ODBC. I keep getting the following error: [Microsoft][ODBC Driver Manager] Data source name not found and no default driver specified ODBC seems to be correctly configured, my DSN is correct, user name and pwd are untouched (Admin/no password), and I have used it on machines with Win95/98 without any problems, but nothing going on Win2K. MS Knowledge base says: "The ODBC driver manager could not find the ODBC data source. Make sure the data source name was given correctly. Also make sure the data source name was defined using the same Windows NT account the application is running under, or it is an ODBC 2.5 system data source. If the application is running as a Windows NT service, the data source must be a system data source." I can only guess at my ODBC version being wrong, how can I know that? Any other ideas? I'm using PHP3.0.14 and Apache 1.3.12. Thanks a lot. Gonzalo.