TMPGEnc isn't converting the audio. In the window where I split the video (set the start frame and end frame) I have the box checked that says Display Audio, but the audio bar never moves. Where might I be missing something?

I tried using Virtual Dub to extract the audio and load it seperately, then I tried converting a 1min clip from the center of the movie, and the audio was WAY off. I don't know if this was because I started it in the middle of the movie, but I don't want it out of sync either way. How can I get TMPGEnc to detect the audio in the avi file?