Ok, i got it working:
I moved soundbridge closer to my pc,
for debugging. And it worked instant.
So i moved it back to my bedroom, and it stopped working again ?!
Let me explain a little of my network situation.
I have a computer as router –> main switch –> switch bedroom and switch living room.
In the bedroom I can watch winamp tv via wired network, soundbridge can play internet radio and i can telnet soundbridge.
So finaly i replaced the UTP between main switch and bedroom switch.
Now rsp works on soundbridge too 🙂
I Would never have guessed it if I didn’t moved my soundbridge….