[AccessD] Form doesn't show selected record

Hi,

A small database, in A2K file format, has a form with a combo-box from 
which a student name is selected.  Then a button is clicked to open the 
student profile form with the record of the selected student.  Used to 
work just fine.

Client used to be on Windows 2K, recently migrated to Windows XP.  All 
of a sudden the student profile opens with no record displayed, yet the 
filter is in place.  If you remove the filter, then put the filter back 
on, the record information appears.  Hmm - why?  What should I be 
looking for?

TIA,

Tina