Firstly, be sure to check and double check that you are typing everything correctly, including your registration code (this needs to be in upper case). If you have auto complete turned on, turn it off and re type everything, just to be sure. If you continue to see the error message, please reset your KONAMI ID password at: https://id.konami.net/login.do
Please do not delete your KONAMI ID.
Once you have used your KONAMI ID to log in to PES's online mode, your ID becomes linked to your game registration code and you will not be able to use another KONAMI ID to log into the game. Please make sure that you are always using your original KONAMI ID.