offline files ok in 2000, not XP

2000 Server, AD, one domain. My Documents are redirected to the users home folders. Our 2000 desktops have never had trouble with this, but the XP clients we add say that *.mdb, *.dbf, etc cannot be made available offline.

I *have* read up on this, and I realise that certain database files can't do this by design. However, users have to click close, or cancel on this message each time they log off of XP machines.

Have any of you encountered this, and how did you fix it?

Thanks