what OS you have?
Sometimes I try to enter the crossfire, a window appears telling me that for these reasons (errors) that was closed (the game)
example:
This is a window pairs which I appear.
I saw that if you delete the folder x-trap from which was recorded
this game (C: / Program Files / Z8games / CrossFire / XTrap) something like that, this error is eliminated; I tried but reappeared this folder