Check out these links. Seems like you have a conflict somewhere.
Unfortunately, a search of AutoDesk's own website yielded no results for "GEDIT3" except for instances of problems reported by other users.
Is your version of LT 2002 current with all service packs?
When did the problem first occur?
Did you make any recent software changes (ex. - antivirus program)?
The only surefire solution I can think of is to upgrade to LT 2011. You are long overdue.