You need to update your users' Jet dlls from version 3.5 to version 4.x. IF you use DAO, you need to upgrade from DA0350.DLL to DAO360.DLL. Other files that come to mind: MSJET35.DLL, MSJINT35.DLL, MSREPL35.DLL, VB5DB.DLL, VBAJET32.DLL. I'm sure there are others.