No sound after I hooked up my system (Onkyo 705 and 7.1)

[fabi519]

Heya,
I just connected my system, and don't have any sound.
I connected the PS 3 with the receiver, and the receiver with the TV. Both through hdmi cables.
The PS 3 hdmi cable goes to the IN1 of the receiver, and the hdmi receiver from the OUT to the IN1 of the TV.

I have a picture but no sound.
I also set up the receiver as it was shown in the instruction manual after connecting everything.

I did:
1. Input/Output Assign (Menu)
2. Monitor Out (Input/Output Assign)
3. HDMI Input (Input/Output Assign)
4. 1-1. HMDI Monitor -Yes-
5. 1-2. DVD IN1 (HDMI Input)

I have a Sony XBR4 52, the PS 3 and the Onkyo 705.
I connected the cables and colors as they are shown in the picture, and when I am going through the menu, I get the test sound of five speakers and the subwoofer, but not the surround right and left.

The speakers are 7.1 and also from Onkyo.

What did I do wrong? How should I connect the stuff?

Thanks in advance