Hello, I have trouble with gmusicbrowser. It can't play mp3, but the other formats as flac plays without problems. If I want to play mp3, I get error
QuotePlaying error : Can't play '/media/music/Make You Famous.mp3'.One of these commands is required to play files of type mp3 : mpg123, mpg321


The other programs haven't problem with mp3.

Anybody has an idea what should i do?  :-[

You should install the package libgstreamer-perl (or something like it, like GStreamer-perl), and select gstreamer in the audio tab of gmusicbrowser's settings.
Alternatively you can also install the package mpg123, but it's usually best to use gstreamer.