Once you add a reference to a database and save the code it should stay there, or, if using a different version the next time you open the database, they should appear in the list of references as MISSING if they are not available. If that is not happening
you need to check if you can actually use those libraries. Not every library is properly registered for use in Access.
By the way, most of the developers I know shy away from ActiveX controls as they are unreliable across different operating systems and versions of Office.
Bill Mosca
www.thatlldoit.com
http://tech.groups.yahoo.com/group/MS_Access_Professionals