Access'97 and ODBC

Hello,

I have a problem using Access97 and PostODBC (po021-32.tgz).
I can link PostgreSQL 6.3.1 tables to Access'97 but I can open them
only if they are empty.
If I insert data into tables and then I try to access it, I have the
following message:

       Receiving an unsupported type from Postgres (#14) SELECT (#513)

                             Thanks for any help
                           Jose'