Porcaster game recorder wont work!!!.

[MNLiveGaming]

i have procaster downloaded and i can record my screen and start the game (crysis) but the FPS are slow and makes it so i cant play, then i saw a game setting i click that and so i start up crysis and it i click the bottom to start it and it just pops up with the message saying click this to start recording a dirctx or opengl game and crysis is so it should work and i dont know why is isnt. please help