the SPACE filename completion is not working

[Luis A Escobar]

I am using GNU Emacs 22.0.501 in a Windows XP environment.

  I just installed Emacs (but I have used it before).

 To open a file I key in

  C-x C-f

and in the mini-buffer I see  c:/lae/

Then when I  key in SPACE after the last /, I get a "blank" space rather
than a filename completion.
 If I, however,  key in TAB after the last /,  I get a filename completion.

 How do I enable the SPACE key to work for file completion (I need both TAB
and SPACE file
 name completion).

Thank you for any help

Best regards, Luis A Escobar

Louisiana State University