I have Teac PowerMax 2000 Dolby Digital Sound System connected to Optical output at my Terratec Fun 5.1 sound card. My dvd's worked just fine, Dolby digital was excelent, but few days before I reinstalled winxp and now I can hear cracking noise coming out of my speakers, only when I try to watch DVD. Sound is great when I am listening to music or watch Divx... I had Power DVD XP 4, and I installed Power DVD 5, now is better, but still there is a problem...

If somebody knows what I can try to fix this, please, write...