How Can I Login with My Existing MyPlayer Account?

Hi guys,

So you know, NBA 2K14 gone free for PS+ members today. I already owned NBA 2K13 and NBA 2K14 on PC and used same accounts for them. But I can't sign in on PS3 with my existing account. When I open the game, it forces me the create a MyPlayer account. I can't see anything like "Login with existing account" or something like that.

So, how can I login with my existing account? Or I must create a new MyPlayer account just for PS3? Thanks in advance for your replies.

P.S: Sorry for my bad language, English is not my native language.

iirc is separate and through your PS3 account, then it gets linked together later....or something.