TMPGE Xpress 3 - No sound

I am having problems with some of my encodes using TMPGE Xpress 3.0. I don't have sound on some of my conversions. For example, I recorded UFC 66 and used the MPGE tools to take out the video and audio. However, when I burned it to a dvd the sound was going in and out. Not skipping just in and out audio. Then I recorded 24 premier and worked fine. So then I did prison break & House(dl) and no sound at all covverting avi to the seperate audio+video dvd converion (48k stero). I had sound on a fansub I dled, and my rips have sounds. No sound with the audio file on the computer either (though its file size was still 100+ MB). I can play the original fine. Any Ideas?