Hello, I have a new LG HDTV and a new Pioneer receiver. I'm using an Antenna to get channels over the air. I want to play sound from the television through my receiver and out through my speakers. For some reason, I only hear SOME sounds from the TV through my speakers. I can hear NO dialogue, but background music and sound effects play perfectly. I have no idea why this is happening, and I don't really know what to do. I'm new at this and thought I knew what I was doing but apparently not. Any ideas?