I've been using an integrated sound device and the icemat siberia headset for a while now, and it worked perfectly. When I plugged the usb in for the headset, the speakers muted and the headset turned on. I recently put a Soundblaster Audigy 2 ZS sound card in, but now when I plug in the headset, it doesn't turn on the headset. My computer recognizes that something is plugged in, yet the speakers don't mute and the headset won't work. (Yes, my drivers are up to date). How can I fix this so the speakers will mute when I plug in the usb and the headset will work?