Ctrl-alt-del to restart window manager with xfce in wheezy?

[Rick Thomas <rbthomas@pobox.com>]

I've got xfce window manager installed on pretty-much as it comes  
fresh-out-of-the-box Wheezy.

I'd like to have <ctrl>-<alt>-<del> restart the window manager.

I've configured it to do so with "dpkg-reconfigure keyboard- 
configuration", but (even after a reboot) that doesn't seem to do the  
job.

Anybody know what I'm missing?

Thanks!

Rick