Linking problem in Access 2000

I believe this has to do with Access 2000 but I am not 100% sure.
The reason I say this is that the problem seemed to have started when
we upgraded to Access2000. The problem is hard to pinpoint because
different things happen at different times. I mainly get the error
message "Microsoft Access can't open the table in datasheet view".
Sometimes I don't get the error and the table opens but it is blank.
And then other tables open with no problems. When I try to run
queries on the tables with the problems the cursor turns to an
hourglass for a second and then nothing happens. I am using
DataDirect ODBC driver 3.50 and linking to progress 8 database.

Thanks for any help