I have an Access version 9.0 .mdb file (Access 2000) that I converted to Access 2007. The very first time I try command buttons on a form in the newly converted db, they work. However, when I close the db then open it up a 2nd time and click command buttons on a form, nothing works. For example, when I try to click a command button that simply opens a message box or close Access, nothing happens. No error message, nothing. I checked all the references, and the VBA code behind the forms compile OK. Any ideas? Thanks.