Do not know my password

I currently have Windows Live Mail downloaded to my computer and my emails can not send and receive because my password is incorrect and i can not remember it because i made it almost 10 years ago. I was wondering if there was a way of resetting it. I tried the https://account.live.com/resetpassword.aspx but this page is just for accounts that work through windows online. The message that it is displaying when i try and send/receive mail is:Unable to send or receive messages for the Optonline (auto1) account. An incorrect password was entered. The next time you send or receive messages, you'll be asked to enter your user name and password for this account.

Server Error: 0x800CCC90
Server Response: -ERR [AUTH] Authentication failed
Server: 'mail.optonline.net'
Windows Live Mail Error ID: 0x800CCC92
Protocol: POP3
Port: 110
Secure(SSL): No

I was wondering if there is anything i can do to fix this. I know how many characters my password is but all the passwords i use do not seem to work.

Thank you