on toca race driver 3

[leleware]

hy everybody..
i have a big problem with this game.. i have an original copy, i boutght it because is the only one that suppose to work... that's wrong..
when i start the game it's all good for 5 minutes, then the screen starts blinking and the system shut down !!! It seems like a sort of cd check, but i have the original one inside, i don't have alchool or daemon installed, i have patched the game to 1.1...??? the same dvd on another pc is good..
what should i do ?? the starforce consider my copy like a reloaded one ? should i delete starforce or dvd check via reloaded cra**?? i really don't know
help me please