I have the audio hooked up through an Acoustic Research fiber optic cable to my Onkyo R500 Receiver. I have the Onkyo HTS 650 system by the way. How do I get this new DVD player to put out 5.1 sound? I am only getting 2.1 sound, even though the display on my receiver shows "DTS" or "Dolby Digital." I went into it's "setup" menu, and selected "bistream" for both DTS and DD. Any help would be greatly appreciated. I know for a fact that all my speakers and subwoofer are connected correctly, and they do work. How do I get the s35 to put out 5.1 sound and not 2.1?