DVD Lab- Audio Missing?

Alright, I have spent a lot of time teaching myself how to use Dvd Lab Pro and I think the Dvd itself came out really good...only one problem.
I made an intro to the DVD(its a season of a tv show) using clips from different episodes and putting audio to it.

well it plays fine, and I have it in VOB format. But when I put it in the menu as a motion menu and compile the DVD, the video plays, but no audio.

Any suggestions as to how I can get this to work right?