Passwords are case sensitive.
If you have recently requested a new password, waiting 24 hours will allow your account to update. A cookie is a small piece of information stored by your browser that helps identify who you are. If your cookie is not being accepted correctly, you will be logged out of your account as soon as you move to a different page. This may be blocking your current ability to log in or stay logged in. You can only change your login name by opening a new account.