does function-key-map work?

[Sam Steingold]

GNU Emacs 22.0.50.2 (i686-pc-linux-gnu, X toolkit, Xaw3d scroll bars)
 of 2006-02-07 on quant8

my "window" key is the "super" modifier,
and "meta" is hijacked by the window manager,
so I use this:
(define-key function-key-map [(super ? )] [(meta ? )])

and I see (C-h c runs the command describe-key-briefly):
M-SPC (translated from s-SPC) runs the command just-one-space
which is what I want.
alas, when I actually hit "window-key -- space", I get this error
message:
M-SPC is undefined

what's going on?!

-- 
Sam Steingold (http://www.podval.org/~sds) on Fedora Core release 4 (Stentz)
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