Gears Of War sound problem

Hey,Damn Man...the first hi-res cutscene of gears of war and the sound aint coming...what to do? sound's perfect in the ingame cutscenes and during the game but is just not there in the hi-res cutscene.SPOILING MY EXPERIENCE,any help would be appreciated.

Thanks,
Troubled gamer.

I have the same problem any help or helpful idea will be really appreciated... :)