HDMI pass trough of Dolby True HD/ DD 5.1 audio

[Paladium]

Hi,

I'm struggling to get this to work. Any input would be appreciated to correct this problem
Setup:
- TV 46PFL9705 WK 36-2010, SW 140.27.
- HTS Yamaha YSP4100 SW 7.03. 1x HDMI-ARC, 4x HDMI 1,4 in.
- BD BDP8000 SW 1.53.
TV and HTS are connected trough HDMI-ARC connection.
When I connect the BD-player to the TV at HDMI 2 the 5.1 sound is not passed over to the HTS via the HDMI-ARC connection. The output to the HTS is stereo.
Connecting the BD-player directly to the HTS over HDMI will give me the selected 5.1 sound.

Is the TV not capable to pass trough 5.1 surround over HDMI?

Thanks,
Ben