Forum:F3 for PC can't run anymore not over encumbered im perfect health no rad or injury any help?

I've been playing fallout 3 for a while and no problems. then all of a sudden my character can not run. he is not over encumbered, not crippled, no over exposure to radiation. I only have one save file and every time i load it my character hasnt changed or anything. Ive tried shutting down computer and restarting game but no change in characters running/ walking abilities. Any help? —Preceding comment was unsigned. Please sign your posts with ~ !
 * Does he run if you hold shift? If so, he's just in walk mode; try pressing "r" to toggle back to run mode. -- Kris mailbox 05:55, August 29, 2010 (UTC)
 * Thanks it worked much appreciated
 * Thanks it worked much appreciated