Office 2000 Problem

Ok guys: I havean intel based 733Mhz -
running winXP. I installed office2000 months
ago, It worked fine for about two months. all of
a sudden, when ever i try to open an office
document or i try to open an office program
(excel,powerP,word etc.) the program
automatically shutsdown itself on startup.
I have tryied reistalling office, i have tried
deleting and then reinstalling(which worked
once before). but now the problem is back .

I need help
-vassy