Add-In Manager for Excel97

Trying to Add-in (2) .xla user created applications into an xls file. First add-in displays fine, the 2nd add-in overlays the 1st and once that happens, you can’t re add the 1st add-in unless you close and reopen the .xls you are working with. Needto allow a user to utilize both add-in tools from the tool bar either together or display 1 at a time.