hack help

I installed a hack, now combat arms loads for a while, then closes itself. Does this mean the hacks been found. If it has, how do i un inject it? If it hasnt, why is it closing itself?

what hack have you downloaded?

Most likely the hack has been implemented on Nexon's dll list, and well you can't use it anymore.

As for how to have it un-injected, I'm not really sure what you mean. If you use an injector, don't launch the injector, and delete any files you have put into your combat arms folder. Furthermore, use one of Mpgh's cleaners to ease your process of deleting, since that might also prove to be a challenge for you.
Here's a cleaner, since you might ask where to get one:

___...:::[CLICK HERE MOFO!]:::...___