I too purchased a Mad Dog Burner. I replace my existing Adaptec CDrw drive and EVERYTHING works fine.. I mean I can even burn a DVD R disk. But I cannot playback any DVD disc at all. It happens exactly the same as Rodfan said. It just sits there .. I checked my windows media player and there is a DVD tab under tools option. I have no idea why everything would work except the playback . It cant possible be an incorrect master/slave setting etc since the drive works perfectly except for this (I can play audio cds too)..
Mine too says system aspi not installed. But if you select Nero aspi that says its installed.
Don't know what to do here ..