Nero Vision 5 menu audio?

I've been using Nero Vision 4 for awhile now to put a video clip of a movie as the backgroud to the main dvd menu. All I had to do was import the clip and the audio automatically came with it, but this dosen't seem to be the case with NV5. The video imports and sets as the background fine, but the finished product dosen't have any audio. If I play the clip using other programs the audio is there. I see an option to use 'No Audio' or 'Custom Audio, but when I 'browse' to where the clip is, nothing shows up as available. Also, the main movie audio works fine, it's just the menu I can't hear. Any ideas?