First of all, I updated the gmm's build system with the latest version. Next I created a new CVS module for music manager and imported all files into CVS.
I updated musicmanager to the latest version of FOX (snapshot). It definitly doesn't work anymore with FOX 1.4. I fixed an issue with the playlist sorting which wasn't put in the right state when starting up and I fixed a crash related to deleting something that doesn't exist.