If you get the error saying-
You will need to download the dll.
Extract it to your Combat Arms folder.
(Do the same with the injector and hack dll.)
Run the injector (preferably Valkyrie) thats in your CA folder and find your hack .dll
Run Combat Arms and press insert chose your hacks and your good.
Its short and simple BUT ITS FOR PREVENTING THE CLOSING OF A GOOD HACK! Also this is the problem many have.