yeah me too like when i get to the lobby i d/c
Still... go into internet settings on firewall and allow engine.exe and combatarms.exe.
Also, try sending a ticket into nexon.
Send a ticket to Nexon, run as Administrator and check your anti-virus because it still could be blocking it. If nothing turns up, disable your anti-virus and firewall and re-install while they are off my last solution is try on a different computer because it may be your internet provider for some reason.