I have the Yahama YHT-196 system (includes Yamaha HTR-2064 amp.). I have the following connected to the amp.: Sky HD box (HDMI 1, Audio 1 (optical)) WD TV Live box (HDMI 2, Audio 4 (optical)) Both boxes connected via. both HDMI and optical audio. Both boxes are set in Options to route audio through the optical able. I am having issues with the Sky HD box/connection. I am using channel 169 (BBC HD) to test. It's currently broadcasting "BBC HD Preview" (which includes a 5.1 speaker test). When I press HDMI 1 on the amp's remote control, I get the Sky HD appear on the TV, but only in 2.0. When I press Audio 1 on the amp's remote control, I get the Sky HD in 5.1 but there is no display on the TV. How can I view Sky HD in 5.1?