oldhokie 0 Newbie Poster

This may not be the proper forum for this question if so I apologize and point me in the right direction. Here is the situation. I just reinstalled flightsim x on a machine that had to be overhauled after a lightning strike. It seemed fine at first but after a while it will not let me run the missions. Free flight is fine and seems to be working 100%. I would appreciate any ideas. I have uninstalled and reinstalled.
thanks