[Pharo-project] Is the plugin JoystickTabletPlugin of the CogVM package working?

Hello! Does anybody know if the JoystickTabletPlugin is actually working for Pharo? I'm trying to use it with CogVM with no success :( I see in InputEventHandler that there is support for pen tablets using this plugin but I can't manage to make it work. As it comes in the CogVM package I assume that somebody put it there because it works, but I keep getting "PrimitiveFailed" error messages wether I have a tablet connected or not. The external plugins of the CogVM are supposed to work without me doing anything? Just executing the VM? Or do I have to activate them somehow? Sorry for keep bothering with this :$ And thanks! Carla.