I might be doing something wrong, but when I burn a dvd video that i edited myself, it shows up with the audio on the playback before you burn it, but the audio dont play on my tv/computer or anywhere else i try the disc. What i did was create a pro wrestling commercial, so i turned down the volume on the video to stop from hearing the announcers, and put on music in audio 1, looks and sounds good when i play it on there, but like i said, no audio in the dvd player.
Which version of Nero are you using? It seems the last one has some bugs in the audio area. Still trying to figure out exactly what will or won't work.