I have to US CBT too. But faster luanch the game a message appear (GameGuard: 124) I don't know how to fix it. It for that I want to test in Korea server.
If you know ow to fix it ...
did you try delete gameguard folder and let the game update itself ?
gameguard error 124 seems to be related to an improper nprotect installation.
if it doesn't work, check "gameguard error fix" on google. you'll find some clues about your problem. there's a little gameguard patch for problem with windows 7 : http://www.mediafire.com/?sharekey=5...4e75f6e8ebb871
extract the gamemon.des into your game install folder, replacing the old one, delete gamguard folder. relaunch the game and let in update by itself.