I recently installed WinTV-HVR1600 card for getting cable tv on the monitor. I have a geforce 7600GT graphic card and a asus p5b mobo set up for 5.1 sound right now. the subwoofer i have works with games, cds, sound files except with the tv card. I tried doing the audio configuration that you normally do with the tv card and alittle playing around with the speaker cables. Is this any kind of known issue ?