I've had this issue since yesterday's patch. I haven't been able to start the game at all.
Basically the screen goes black and the game looks like its loading. It stays like this for about 5 mins and then it crashes, giving me the 'You have been disconnected from login server' error. This happens whether I log in from the site or through GameLauncher.
I didn't have this problem before the patch. I tried reinstalling MS to no avail. Any suggestions?