I've had similar problems with vfp. In my case, it was a dsn connection.

To test it, I converted the vfp table to Access and ran the same ASP code on it. Result: not a single error! It leads me to believe that it might be the ODBC driver itself.

If you find out anything else about this issue, I'd appreciate it if you could share it with me. It's kept me up many nights!