I have installed Flash Player 13 on my Mac Book Pro running the OS X 10.9.2 and Version 28.0 of Firefox. According to Flash Player Help Flash Player is installed correctly (the graphic appears and the clouds move). Everytime I need to use Flash Player I get a message saying the Flash plug in has crashed. I have reinstalled the software several times all with the same result, i.e., Flash Player crashes everytime it is called. What do I do to correct this problem?