I just bought a Pioneer VSX820. I also bought Polk surround sound speakers and sub. I've got all the speakers hooked up. I'm confused as to how I'm supposed to hook the receiver up to the tv. I plugged the HDMI into the tv and the receiver. From the manual I have gathered that I needed a optical audio cord, so I bought that and plugged it up. I finally figured out how to get to the setup menu and ran the sound tests. Then when I wanted to watch tv I put the receiver on TV/Sat and the speakers work but the sub doesn't work. Also, when I went to plug my ipod up to listen to it the receiver says "no device". I just don't know what to do! Any help would be greatly appreciated!