Word is a lone blue apple / no task bar / will not open

I do not know what caused my WORD to become nonfunctionall late yesterday
afternoon. I performed usual functions in a few docs, and later when
attempting to open the same doc I had previously edited, I got a rainbow
wheel spinning for an extended period of time. The doc never opened again
and I now have only a lonely blue apple in the top left corner instead of the
full task bar. When I try to open WORD, the error message states something
to the effect that the function can not be performed.

My other microsoft office apps are fine.

Mac OSx, Microsoft Office 2004

Please help if you can.

Thank you,

YvetteMountain

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