Hi Laura,
This sounds like an OS X issue--there's no setting in Word that would take
care of it. There is some troubleshooting information at:
http://word.mvps.org/FAQs/WordMac/index.htm
However, for Mac-specific problems that involve software/hardware
interactions or installation issues rather than manipulating Word itself,
you are probably better off re-posting in a Mac newsgroup:
microsoft.public.mac.office
microsoft.public.mac.office.word
You can access these through the MS site, under Support, via Google Groups,
or by setting up a newsreader.
Newsreaders are usually most efficient--here's a link on how to configure a
newsreader (e.g. Entourage or Outlook Express, note that URL is broken by
text wrapping)
http://www.microsoft.com/mac/community/community.aspx?pid=newsgroups&page=ne
wsgroupsetup
FYI,
microsoft.public.mac.office.excel
microsoft.public.mac.office.powerpoint
microsoft.public.mac.office.entourage
Also exist.
DM