[Wolves] Ubuntu compiz

[David Morley]

I have followed this
https://wiki.ubuntu.com/XglHowto?highlight=%28xglhowto%29 and it
doesn't seem to work.  when I type in gnome-window-decorator in a
shell rather  than nohuping it it gives me the following error 
gnome-window-decorator: Another window decorator is already running.

How can I find out what gnome-window-decorator is running please?
--
Seek That Thy Might Know