Unable to log into client

I launched the League client and tried to log in. It said my password was incorrect. I tried it 3 more times, still incorrect. I go to the boards here and log in using the same name and password, it works. Try logging into the client, password incorrect.

I tried resetting my password, typed it in notepad, and hit copy. I then logged into the site by pasting the password, logged in fine. Pasted the password to the client, says password is incorrect.