Not sure how to start, when I have both plugged in the Katana will not produce any sound (even when set as sound device) . As soon as I unplug the wifi dongle for the headset I get sound from the Katana.

After some more investigating I discovered that I can keep them both plugged in and switch between them getting sound from both as long as I unplug my XBox 360 wireless dongle. If I plug the Xbox dongle back in I lose sound from the Katana.... I have no idea why this is happening, yes I can live with the wireless Xbox controller dongle unplugged but it is a royal pain in the neck and if I want to use the controller in certain games I lose sound on the Katana !!!!