When you go to login, if you cannot remember your password there is a link that says "forgot your password". If you click that link it will take you to this page:

http://accounts.mmosite.com/port/psw.php

There you must enter the name of your account AND the email you used to create the account. (If you cannot remember the email try looking in your email accounts and searching for mmosite).

If you do this correctly an email will be sent to you with a link that you must click in order to reset your password.

Then change your password to something you will remember (but not that others will guess) so that this does not happen again!

Good luck!