If you're having this problem then please download this launcher: http://www.mediafire.com/download/ma7umxa7uvllats/Launcher.exe
Replace it with your old one but make sure to keep a backup, the reason this is happening for some people is because your internet may be slow and it is having some trouble connecting to the server and because the timeout limit is only 4 seconds, it times out and can't connect to the server. With the launcher I provided I have removed the timeout, so the launcher will still come even if you get the error.
