powerdvd problem

[WeiWei]

I am running PowerDVD 5 with a 4 speaker setup and everytime I run PowerDVD, the volume is sorta limited. I often have to crank the software volume to maximum to hear anything from the DVD. I can also hear a significant drop in volume when I open PowerDVD while playing mp3s. When I close PowerDVD, the volume jumps back up. Why is this so ? Anybody having the same problem ?