If you have not set a password for your account yet, click the (forgot?) link next to Password.
Your password must have the following:
8 or more characters in length
At least one number
At least one uppercase letter
At least one lowercase letter
At least one symbol or special character (!@#$%^&_-)
Your password will expire every 60 days, and you will not be able to use the previous three passwords.
If you have 5 or more invalid password attempts in a 5-minute period, your account will be locked for 5 minutes. To unlock the account, wait 5 minutes and try again, or click the (forgot?) link next to Password to set a new one.