I have tested application to make sure it works on XP and Win 7, which it does. Now when I repackage on XP and after I do the tuner to have a mst file. I can install the application on XP, but not Win 7. Same thing goes for if I do the repackage on Win 7 and stuff the application will install on Win 7 but not on XP. How can I fix this so that one package will work on both OS's.