I have recently found out that some Internet Service Providers block the automatic replys that DVDFab and others send out. Mediacom is one of them. What I had to do was open an email account at Yahoo. Then go to DVDFab and change my email address. Then use my old KEY to register the ver. 3 program. It wouldn't register but it would allow me to ask for another key. I'd done this many times before , but this time I did it with a new email address. In less then a minute I had the new KEY and it worked fine. I've been battling this problem for months and now it's been resolved. gbenton turned me on to this in a PM. Hope this helps others.