Problems mapping space key

[Tim Johnson]

Using GNU Emacs 21.2.1
And 
XEmacs 21.4
On XEmacs, the following elisp command

(global-set-key [(hyper space)] 'global-insert-pseudo-space)

Successfully maps the hyper + <space> key to the quoted function,
but the same code is not successful for GNU emacs.

It appears to me that [(hyper space)] is the incorrect symbol
to use for emacs, what would be the proper approach?
Thanks
tim

-- 
Tim Johnson <tim@johnsons-web.com>
      http://www.alaska-internet-solutions.com