Running Mono Applications in XFCE

I have been using XFCE for around a month. Yesterday I tried installing gnome-do. The installation was successful but on running gnome-do I kept getting an 'Unable to open the session message bus.' error on my terminal. Today, after installing Banshee I faced the same problem.

Googling did not help – possibly because XFCE users do not user Mono applications much. After a little hit and trial I figured out that the problem could be solved by launching mono applications as dbus-launch <application-name>. So to start gnome-do you type dbus-launch gnome-do.

PS: The Super + Space combination does not seem to work either – I’ve changed it to <Alt><Ctrl>Z.