working or not! the blue light on the receiver that is supposed to be on when you are on a hd channel does not light up blue when I am on one of those channels. so, what does this mean? when I switch from one reg channel to the same in hd, the blue light does not go on and I see no significant difference in the picture. I am so confused now. Is it working or not? do I have the wrong recei ver? it says it is an hd receiver.......I am at a loss here.