NBA 2K13 PSP INFO

I have a couple of questions: why then if I change the roster every time I start an association with them reset? What can I do? and the second question you have to slide the psp version?

excuse me for the bad english i'm from italy

please help me, i wanna start the association with update roster but how can I do because every time resets the roster

I dont think anyone here has the PSP version. Try the official forums.