Slight OT: GDM Sessions

[Jesper Mørk <geo@fusserne.dk>]

Hi all

This is slight off topic but didn't want to bother with joining the 
correct list since you guys propably know the answer

I've compiled Gnome from cvs using jhbuild and i would like to be able 
to start the compiled gnome from gdm.

I've added a jhbuild.desktop file to /usr/share/xsessions/ with this content
[Desktop Entry]
Encoding=UTF-8
Name=GNOME-CVS
Comment=This session logs you into GNOME CVS
Exec=/home/jrm/bin/jhbuild run gnome-session
Type=Application

But when i try to log in using gdm i always get the default debian gnome 
installation and not the cvs version. And yes I have chosen the right 
session before login :) When choosing the sessions in gdm the GNOME-CVS 
option do appear.

What log files would be interesting to look at?
What am I doing wrong?

/Jesper