I just bought this game, and got it installed a few hours ago. I tried  to run Training missions to get myself accustomed to the cockpit and  procedures. From the main menu i select Training, then select A-10C  Familiarization, then Introduction to the A-10C and hit start (the play  button). As soon as i hit play, it gives me an error message.   
Error: String ".'missioneditor\modules\me_mission.lua"]:4683:cant open".\temp\tempmission.miz" for 'wb'   
and then gives me a traceback....what am i not doing right?