No sound from Dvds when i play in Windows mce 2005

[Gflo]

Well,

I have windows mce 2005 rollup 2 and when i play a dvd in media center i have no sound but, when i play it in cyberlink power dvd i get sound. weird ay? i normaly wouldent mind switching to power dvd but the playback sucks. so any suggestions?

 

[gjj]

I have the saame problem except that I only have sound when I play the DVD in Roxio Creator 9 using cineplayer