phat psp v500 m33-4 nitePr codes dont work

[scavenger]

Hi, I have a phat psp with cfw 500 m33-4 installed nite pr rev k properly. I can see the codes started playing "Killzone" and it dont work when I actvate them. Is it because it doesnt work for cfw 500 m33? or the codes I got dont work at all? Pls. response thanks.

[ejm06]

i had the same problem with killzone all the codes i had didnt work its gay and if you want upgrade to 5.00 M33-6