BScreen::BScreen: error, unable to use fluxbox.

I am totally unable to run fluxbox for the last two days and I get this
error message in the logs - 
##############################
BScreen::BScreen: an error occured while querying the X server.
	another window manager already running on display:0.0
Error: Couldn't find screens to manage.
Make sure you don't have another window manager running.
##############################
there is nothing that seems to clear it, it even comes up after a
reboot or a shutdown. I've looked on the wiki and not being able to
find anything relating to it, so I'm hoping you gurus can come up with
a solution for me so that I can go back to my beloved fluxbox again.

There is no other Windows Manager running, I've checked in 'pstree' and
its happened to a new user that I created after yesterdays attempts. 

Hopefully thanks
Sharon.
-- 
A taste of linux = http://www.sharons.org.uk/index.html
efever = http://www.efever.blogspot.com/
efever = http://sharon04.livejournal.com/
Debian 7.0, Fluxbox 1.3.5, LibreOffice 4.0.3.3, 
Claws-Mail 3.9.0-182-g852877
Registered Linux user 334501 


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