Realtek hd audio 5.1 surround sound problem

Hello,

I have a weird problem. I just got windows 7 and updated my sound card drivers. Now I have a problem which I had before but I solved it in some way ( don't remember how) :P.
The realtek sound manager recognizes my 5.1 system when I test it, but when I play something on limewire there is just sound coming out from the two side speakers.

Then if I chose an environment sound effect it starts coming from all speakers.
I have all computer audio settings on 5.1, any idea what problem could be?

Thanks