No sound on TV when connected via Yamaha YSP-2200

Hi All

I have serached loads of forums and can't find an answer to my question.

I have the following setup

TV Samsung LE40B652 (HDMI 1) ----------> Yamaha YSP-2200 (HDMI out)

SKY (Optical Audio) ----------> Yamaha YSP-2200 (Audio Input 1)

SKY (SCART) ----------> TV (SCART)

XBOX (HDMI) ----------> Yamaha YSP-2200 (HDMI in 1)

PS3 (HDMI) ----------> Yamaha YSP-2200 (HDMI in 2)

This all seems to work except no sound seems to be passing through the YSP-2200 into the TV, of course the SKY is OK as it is utilising the SCART sound channels, but I don't always want to have the sound via the soundbar.

Is there some setting etc that I am missing?

Any help gratefully received