How do you put combat arms codes in

on the Nexon website you have to sign in (if you don't have one use your combat arms, it works for nexon) then after you do that there should be a box in the upper left hand corner which shows all of your stuff and nexon points so you click charge nx and choose gift card or wat ever u have. The second way to type in the nexon points code is to sign in on the COMBAT ARMS website and click play now, then after you are at the home page where you start up combat arms on the bottom left hand corner there should be a selection that says charge nx :)