No sound out from coaxial

[entege]

Hi! I just bought my first bluray, a BDP5200, but I can't get any sound out.
A Hdmi is connected to a Benq 1060 (There is the sound?)
Than I have connected the bluray to my homecinema with Coaxial cable.

I have tried to use the auto in HDMI-sound and the bitstream.
In digital sound I have also tried both the auto and the bitstream, but nothing comes out..

If I try with my old DVD it works, it is an ald 5.1 system.

Please help a lost mind!

kindly regards
Thomas

[entege]

If I put the BDP5200 at PCM I get sound, but than I loose my 5.1!
When I choose bitstream it gets quiet.
If I connect my old Toshiba Dvd-player with coaxial I get Dolby digital 5.1
I'm going mad!
Please help!