What program are you talking about? Can you describe what you're doing, and
what happens? Did it ever work?
Generally speaking, when something doesn't work as expected, there are
several potential causes. In this case, without more information (such as
which Office program you're using), it's hard to say more. A frequent
problem is that a trial version of Office has expired or a non-trial version
has not been activated after 50 uses. Choose Help - Activate Product. If
it's not an expiration/activation issue, and if you're talking about Word,
then take a look at
http://www.officearticles.com/word/steps_to_troubleshooting_microsoft_word.htm