1st Solution: Restart Combat Arms.
2nd Solution: Go to web page, relog and start combat arms.
3rd Solution: Restart your computer.
4th Solution Start Combat arms from Internet Explorer.
5th Solution Restart your router.
6th solution to try (and the one that worked for me) was the Delete Temporary Internet files from Internet Explorer.
7th and my final solution is if that doesn’t work and you’re still having problems, what you can try to do is add
http://*.nexon.net to your “Trusted Sites” from Internet Explorer and see if that works. I tried this and it didn’t work for me but if you’ve tried everything else and still having problems, at least it’s worth a shot right? What else do you have to lose?