Moz9 & streaming mp3

[bugdust]

I configure Moz for audio/x-mpeg so it calls xmms, then hit a link of 
that type. Moz asks me if I want to use xmms, I confirm, xmms launches
and nothing happens. Xmms plays nothing. Same behavior with mpg123 and 
noatun.

Realvideo mime types launch and run ok.

What could be wrong?

OS = Mandrake 8.0