#2 - June 15, 2009, 6:05 a.m.
Once you have confirmed that you want to try the trial account, Ltzero, you must have the appropriate client installed. Your account is temporarily converted to a Wrath of the Lich King account and because of that you will be unable to log into the account without the Wrath of the Lich King client installed.
My best advice is to find a friend who has it and who will let you borrow the CD to install it. Otherwise you will need to contact our Billing Department in order to remove it from your account.
You can call 1 (800) 592 5499 (1-800-59-BLIZZARD) Monday through Friday 8AM-8PM (PDT) for live representation.
Australian users should please call 1-800-041-378 if the standard 800 line does not work.