HELP? Having trouble with the sound on my PS3 and my Onkyo 805

[kitkat99]

now i got the ps3 so i could enjoy movies and games, the hole point of hi def is to enjoy the hidef picture and HI DEF sound. I have the onkyo 805, however i cant enjoy my rush hour 3 with 7.1. i even set the ps3 to send bitstream instead of pcm so that my receiver can decode it , but nope only send in multi channel and doesnt even send anything to the speakers #6 and 7. i never get those speakers to light up on the receiver even when i am playing a differ movie with dd + or dex or dttrue hd which are supposed to have 6 channels. i have all my settings correct. does anyone know why i have this problem.
Bottom line if you dont get the hidef sound your only getting half of the benefit of blue ray movies. any suggestion how to fix my problem?

I cant enjoy any sound in the rear two speakers # 6,7 except when watching tv where i have it set to neural audio 7.1, then those speakers on the display light up.

i also have an hd dvd but it only sent out sound in pcm, but on my ps3 the setting shows that i can send it in bit stream, so my recvr should do the decoding, but i get nothing other thean dobly on the display, Spider man 3 has dolby true hd, my display doent show d true dhd just dolby?

i have highly tech question, van anyone give me suggestions on how to get these questions answeered.

P.s also have the samsung blu ray from costco, that one send out in bitstream or pcm and your supposed to get it sent out in true form an my display on recvr should show d true hd or dts hd, havnt tried it yet, the playre is going back crappy and with software 1.1 not compatible or upgradeable to 1.2 whitch is the new blue ray format- so u can enjoy the xtras

please help.