Switchable graphics

asifhasjf

My laptop is HP Pavilion g6 Notebook,it has 2 graphics cards 1 is high performance and other is power saver,when i run Crossfire on power saver it works just fine,but when i run it on High Performance it used to work really good with about 150-210 fps but now right after i open the game ,it freezes at the login screen,please tell me how to solve this problem.