this is my first PSP, I wanted to play homebrew games so I ordered one on ebay with the 3.71 M33-2 custom firmware. It plays the official PSP demo games fine; but when I try to play a homebrew game I get 80020148. I have been searching for an easy fix, but none seem to work. I have gone into the recovery mend and disabled... changed game folders. What can I do to get this working?