program crash

I use Acrobat Professional 8.0 with Windows XP with firefox 2.0 as my primary browser. I have been receiving the following error message frequently when trying to close an Acrobat document:
"The organizer database is damaged and will be reset the next time Acrobat is launched. Quit the application and close any currently opened web browsers."
 
Following the instructions does not correct the problem, which continues to recur.
 
thanks for any help!