Be sure your caps lock is not on as the login is case sensitive.
You can easily reset your password by clicking the "Forgot Password" link. You will be prompted to enter an email address. Be sure you enter the email address you use to login. You will be emailed a temporary password.
There is a chance that your browser may be remembering an old password. If this is true, you will need to clear your cache and any saved passwords. Be sure you know what your other passwords are. For further help, review Wikihow's Clear Your Browser's Cache.
If you still have problems logging in, Contact Support and we'll be happy to assist you.