I need help hooking up my digital cable and my xbox 360 to my surround sound system. I have the following set-up. I have a Time Warner Cable HD/DVR set-top box hooked up to my TV with an HDMI cable. I have the Xbox also hooked up with an HDMI cable. The TV is a Vizio VX32LHDTV. The TV is hooked up to the surround sound system using an opitical cable. The receiver is an all in one. It's a Panasonic SA-PT760. Everything is outputting in Dolby Pro-Logic and I was wondering if there was a way to get everything to output in 5.1.