Macbook? plz help!!! urgent!!!?

i have microsoft office 2007 for my mac and i have been going on it for the past 5 months or so. (not a trial). Today, i tried to open it up and a message cam up which microsoft office encountered a problem and needs to close. when i click on details it gives me lke these "threads." i can open up a doent for lke 1 second but then it goes away. any idea what i can do? plz help!!