Can't exit from panel if not using gnome-session

[Michael Keightley quadstone com]

We are using the Gnome panel here on Solaris and Linux machines either via 
Exceed from a PC or in fvwm2 from a Sun/Linux display.  You can select the 
"Log out" icon on Solaris and the logout dialog box will appear,  and you 
can exit the panel OK.  In Linux nothing happens,  but the error message below 
appears in $HOME/.xsession-errors:

** CRITICAL **: file gsm-protocol.c: line 602 (gsm_protocol_new): assertion `GNOME_CLIENT_CONNECTED (gnome_client)' failed.

** WARNING **: Could not connect to gnome-session.

I'm using gnome-core-1.0.7 on both Solaris and Linux.  It's 
Red Hat Linux 6.0 and Solaris 7.

Anyone got any ideas how to exit the panel without having to use 
Enlightenment or some other Window manager?

Michael
-- 
Michael Keightley <mk@quadstone.com>         Tel: +44 131 220 4491
Systems Manager                              Fax: +44 131 220 4492
Quadstone Limited                            WWW: http://www.quadstone.com