I recently updated to Office 2010. After editing an Access database (originally created in 2007), I saved it as an .accde for the users. However, my users all have 2007. They are unable to open the database. I suspect the problem might be in the VBA Reference Library. My references changed from Microsoft Office 12.0 to 14.0. So when I saved the database as an .accdb and had a user open in 2007, the VBA references showed MISSING: Microsoft Office 14.0. I don't know how/if they can add it. If they can't, does anyone know another way to fix this problem?