Stream configuration problem with Airtime 2.2

Hi,

I've got Airtime 2.2 on Debian Squeeze running, installation went smoothly. But I cannot stream to a Shoutcast server.
The status panel suggest that airtime-playout is OK, but it looks like that it cannot connect to the given Shoutcast server. It permanently says: Getting information from the server (in orange box) and it does not become green.

I've tried to manually connect with a client software (Nicecast on OSX) and it works just fine. So I've tried to connect with the airtime-test-stream utility

$ airtime-test-stream -o shoutcast -P 8000 -m livestream -p xxxxxxx

and it works fine as well.

Any ideas?