Hi i have a slim psp 2000, running prometheus 5.50, i tried to boot any games and after i press x it tries to loads but freezes, also tried to boot the cfw upgrade and it will also freeze, reformatted memory stick, and no luck, also when I put the UMD it will freeze if it tries to load the game, there is some game that even without pressing X to boot it will freezethe screen S: need help here pls