Xbox 360: no sound while watching HD-DVD

I’ve never had this problem before.
After i watched a movie i wanted to watch another one, but i didnt have any sound during the movie.
I still have sound in the xbox menu, but as soon as the hd-dvd starts i hear no sound from it.
I’ve tested with other hd-dvd’s which i’ve watched before, doesnt work.
I just cant find a solution, i could use some help with this issue.
THANKS ALOT !
Answer #1
Reboot the 360 and your reciever and whatnot. Make sure all connections are nice and tight. If neither of those work, look into the 360 audio settings and make sure that the 360 is putting out an audio signal that your reciever is capable of decoding. (My ps3 sometimes decides to change its own settings… Something similar could be happening here too.)