the format of the cdb files changed in ppc2003, try this link it should lead you to a conversion tool.
http://www.microsoft.com/downloads/details.aspx?familyid=636008aa-a011-4188-a1aa-4dd723e315bf&displaylang=en
Cheers
~M


>Mark,
>Thanks for responding, but I don't really understand what you are asking.
>The application is distributed to users who may, or may not have MS Access on their machine. The problem is when the PC desktop control program attempts to transfer the MDB to the PDA, which entails a conversion process by ActiveSync to a CDB file.
>Further investigation reveals that ActiveSync 3.7 is not the problem - it seems to be a change in Pocket PC 2003. However, I still do not have a solution.
>
>Any further advice would by greatly appreciated.
>Regards
>Mike Rothery