i tried all the ways,re-installed the game and its V 1.0.none worked.the problem is,i dont have a graphic card and my onboard graphic card is just a 64MB(intel 865 mother board) one.hence the plane just skips a step forward instead of accelerating normally.so even if i reduce the graphic settings its not possible to get on the plane.hence the only way out for me is to get a saved game from some one else.thanx for the suggestions.