Hum. Have you closed out of the place where you get your login password from? This happened to me. If you close it out it will not accept the password because your login and logout passwords are... I guess you could say paired. So If you close out and try to log in with a new password... it wouldn't work because thats not the login password it was paired with.
When i try to enter my logout password in my tama it does not accept it. why is this?