In order to use all online modes in PES 2014 you will need to set up a KONAMI ID. If you already created an ID for PES 2012 or PES 2013 then feel free to climb up the ranks again with this ID in PES 2014. In order to set up a new ID, please head to the following website - https://id.konami.net/login.do 
Click the 'Register' button to get started and follow the on screen instructions. A KONAMI ID is free of charge and it is important to have a valid email address to use for account verification.
For more information about the KONAMI ID in general, please visit the FAQ section of the KONAMI ID site. You can find it here: https://id.konami.net/faq.do