I just purchased a Denon DHT-391XP Surround Sound System. When I connect a HDMI cable from the Dishnetwork 211k receiver to the Denaon receiver and then a HDMI cable from the Denon receiver to the TV, I get the audio, but no video. If I connect the 211k diectly to the TV, I get audio and video. Any idea what I'm doing wrong. I've been trouble shooting this all day with no luck.