Problems with the login

For those who experience log problems since yestarday I found that your problem could be (as in my case) the realmlist, check that your realmlist says: "set realmlist logon.warmane.com" instead of "set realmlist logon.warmane.ru".
You can search for the file at the game folder called data, then go enUS (if you have the game in English, otherwise check for your language folder) then open the file "realmlist", you can open it with notepad.
Regards!