Poped up "error" screen

Try to reboot your psp (turn it off for 5 secs,then turn it on again).normally it should be working just fine.if not,remove battery and put it in,then reboot again psp.if no dice still,use a different working memory stick pro duo (borrow or use your backup ms),and chances are it should work granting there's no major hardware malfunction in which case if it is still covered by warranty,you can bring it in for repair.now,if you're encountering the problem only when loading the game,the issue probably is with the game.check a different game and see if it'll work,if it does,your game or application has issues and not the psp.no guarantees,hope this helps.