Hey, just bought a sony bravia 5.1 surround sound system, got everything hooked up etc. did the "autocal" (auto-calibrate) and that went fine, had sound in all 6 speakers. but after that i turned on my tv/xbox, played music on my xbox and i'm only getting sound in the L/R front speaker & subwoofer.. the L/R surround & center speaker get no sound.. i honestly am dumbfounded..

tv is hooked up to xbox via hdmi.. and hooked to surround sound via fiberoptic..

i had a $70 system before this and worked fine doing this exact set up.. anyone have any clue what i'm doing wrong? any help is appreciate thank you