First, it is important to note that your user name is case sensitive. For example, when you created your account, you entered Mary Smith. So, when you try to log-in, it has to be entered in the same format - capital M, capital S, and a space between the first and last name.
PS: Also, make sure your CAPS LOCK is not on. :)
If you are still encountering issues, please email us. We will be happy to check your records and send you a copy of your user name.