Hello everyone !

After reinstalling windows (xp) , few days lated i start to hear the constant high-freq. sound in my headphones from the Audigy2 ZS. I have tried with different PCs, and reinstall the drivers several times, on-board audio was disabled as well.
This sound sometimes disappear if I switch to 5.1, 6.1 or 7.1 speaker mode AND at the same time mute the "Line In" and "CD audio" in the mixer.

Anybody faced a similar problem? Does anybody know what should I try more before to send the card to service ?
The card is 2+ years old and has been working flawlessly during this time.

Thank you very much for any suggestions!
N.B.