Lost Sound on DVD with some players

I am having a problem with DVD’s I am authoring. I edit video footage, audio is there. I burn the DVD Audio is there. Two DVD players I have play the complete DVD fine. The other player drops the sound about 30 minutes into the DVD. I have distributed several DVD’s (DVD-R) and some people loose the sound and some don’t. It seems to somehow depend on the player. I have retreived evey “BAD” DVD and have checked it, the same results each time. Plays fine in some players an drops sound on others approximately 30 minutes into it. Anyone have experience with such? :sad:

What format has this audiostream?