Netbeans ssh authentication

I've been trying to make netbeans ssh authentication work for more than 1½ week now, so that I can commit updates to my sourceforge project.
I've found out that netbeans don't support key authentication in their internal ssh, so I've been trying to figure out how to make the external one work.

I use ":ext:thomasda@cvs.radiorec.sourceforge.net:/cvsroot/radiorec" for the path and "ssh -l thomasda cvs.radiorec.sourceforge.net "cvs server"" for the external ssh command. I nicely asks me for my password, but then is tells me, that username/path/password is wrong, or that it just can't find /cvsroot/radiorec".

have anyone got netbeans working with sourceforge?