Movies have no audio after burn

okay. i burn alot of movies and a couple days ago when i burned a movie, there was no audio. But when i play the file on the computer there is audio. It is only when i burn to disc. anyone have any ideas?

i use convertXtodvd and i also use DVDFab 5. anyone have any ideas?

If it was a DTS audio stream, your standalone player may not support it.