When I play a HD-DVD with my Insignia NS-R5101HD receiver, I'm only getting sound from the 2 fronts. Nothing from the surrounds or center channel. The A2 is set to "Bitstream" and Digital Audio Out is set to "Auto". Are these correct? I'm trying to figure out if the receiver is bad(not decoding). All hooked up with HDMI. Receiver is set to Auto Surround and HDMI Amp. Thanks.