DTS-HD dont work

[arsenal]

hi every one
i down load the last ubdate for my ps3 (2.3) and i buy pioneer reciever lx-70
to enjoy the dts-hd and the true-hd but im surprised that the reciever show me only pcm on the screen .
i tried every thing but no result .
the problem is when i press the select on the ps3 joystic i see dts-hd on the upper bar even the the true hd but on the reciever screen it show me only pcm . im very confused . my connection are all right.
any have the same problem ?
i borrow my friend blue ray player and every thing works good with the reciever i get the dts-hd and true-hd but when connect my ps3 i get only pcm.
can any one help please.
thanks every one.