Thanks for the reply.
I cant make profiles on my receiver. But the settings should be right cause with another source it all works fine.
Made some progress now, found a new driver
for my soundcard and could change from HDMI to S/PDIF. Still I can't make any changes to the sound settings. If I play music with Media Player Classic I use AC3Filter and then I'm able to get sound out of my subwoofer like it supposed to. But when I play music in Spotify it does'nt use AC3Filter anymore and I'm still with the same problem :S