are you sure you hacked your PSP?
by "hack" i am referring to CFW "custom firmware" cause it seems like you are still on OFW "original sony firmware"
take a look in your PSP System Information and see what firmware are you on.
if it is OFW then you need to use pandora to install a custom firmware into your PSP.
if it is already on CFW give us some more info as to what error message that appeared,are you trying to play a UMD game or ISO/CSO this will help us understand your situation better.



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