Just Cause problem

[cptpooface]

I have been playing just cause for about a week with no problems at all using a no-dvd crack from gamecopyworld. I am at a specific mission and the game crashes. The mission is the one where you chase the train in a helicopter shooting at the rocket parts. I blast the last rocket part, then I hear the guy say, "He's getting away Rico don't let him escape." Or something like that, and then it crashes to the desk top. Has anyone had any problems backing this game up? Or any problems like this, I am going to try it with the original dvd, but I would be really interested to know if it could be the dvd crack that is causing the crash.