sync a .cdb with .mdb eVB

I'm having trouble syncing a .cdb on my handheld with a .mdb file on my desktop. The data is being sent from the device to the deskop, but I get an error about a NULL value being stored as in a variable that isn't a Variant. Also, in my desktop database, it's creating 2 new tables, one is the same name as the table that is being updated, only MSysCeC added to the beginning of the name. The other table that is created is called MSysCeConflicts. Has anyone who's done some database work with eVB seen anything like this?