Hey guys

I hope i can explain my problem in english. I installed windows 7 2 days ago and i got a massive sound problem with ts3 now. I use a Creative X-Fi extream Gamer and always if someone talk in TS3 he is going to be loud and quiet. I tryed to change all settings, disabled all Hardware i dont need etc. I got no problems with winxp but i dont know how to get this problem off. Does anyone got the same problem like me?