Hi everybody, I have a VB6 application that runs fine in some PC's with Windows 7, and it does not run in others. I get a "class not registered" error message when I try to run it. In the set up process I get a "can not register msadox.dll" error, so I assume this is the reason. But I've tried to manually register this msadox.dll and I always get an error message in the way that it was not possible to register it. Of course, I'm doing all this like Administrator I appreciate your help.