I'm using an optical audio cable to connect my DVD Player to my Denon AVR-485 AV Surround Receiver. However, the sound is not coming out properly when on Standard Surround Sound Mode. Only two speakers are active, the sound is very hollow - I hear the background sounds, but I hardly hear the foregrounds sounds like voices, etc. If I set it to 6Ch stereo mode, the sound is fine, but naturally I'd rather use surround sound mode. Could anyone help me out here ASAP (I need my 24 fix)?