ADP/SQL 2000 update rollback

I'm using an Access 2002 ADP and SQL Server 2000. I have
a form that is bound to the table (it will only ever be
accessed by one or two users). I added an UNDO button
using a wizard. Additions, updates, deletes and record
navigation work fine. However, when I click the undo
button after a table entry has been saved (doesn't seem to
matter whether I've moved focus off the record or not), I
get a message "Microsoft Access has encountered a problem
and needs to close. We are sorry for the
inconvenience". The rollback or the record has actually
occurred correctly.

When I import the form into an MDB and link to the table,
the UNDO performs as expected.

Any help would be appreciated.

Jim