I'm trying to create a picture slideshow with transition and audio (music) in Ulead Video Studio 7. I'm using the DVD-NTSC template, and I've tried using both .mp3 & .wav for the audio. The video renders fine, and the file plays fine on my PC. However...when I go to burn the file using either Video Studio or Nero, there is NO AUDIO when i play it on any of my dvd players. Any ideas? Here are my project properties:

NTSC drop frame (29.97 fps)
MPEG files
24 Bits, 720 x 480, 29.97 fps
Frame-based
(DVD-NTSC), 4:3

I've tried both LPCM Audio and MPEG audio....

Please help!