HDMI Selector problem?

[tobythetitan]

I purchased an HDMI switch (w/optics) and am running into a problem with my XBox 360. I have the audio going through the switch via optic cable and the video going directly to the t.v. with comp. (until 360 Elite comes out then it will go through HDMI also). Every 10 minutes or so the audio will snap or crack and then be silent for a split second and then go back to normal for another 10 minutes or so. What could/is causing this? Any help will be appreciated. The problem doesn't seem to be happening through my HDTV DirecTv or my PS3 both are going through HDMI and optics.