Need help accessing an old Outlook database on a Mac

I’ve got a G4 that’s running OS X.2. I need to access an old Outlook database from when it was running OS 9, and I can’t figure out how to do it. I can get the old Outlook running, but it’s lost its connection to the old users database, and I can’t get it to re-link to it. When I try to import the database, it says that it couldn’t import the data. What gives? Is there another way to access the old emails?