Excel 200 undo key   

I've had to reload my micosoft 2000.  I am unable to use the undo key or the 
control x key to undo an error I posted.  I've tried reloading it and it 
still is not there.  It works in Word.  Any ideas
-- 
Jack

date: Wed, 7 May 2008 13:04:01 -0700   author:   Jack