How did you get the DVD Compliant MPEG-2 files that you are trying to use in TMPGEnc DVD Author? It sounds like they are not DVD compliant. If you encode in TMPGEnc using the Wizard, then you should get the correct compliant files to use in TMPGEnc DVD author. TMPGEnc Common Problems! http://forums.afterdawn.com/thread_view.cfm/40101