Problem with PSP

Hello. I’ve got some problems with me PSP. I haven’t been playing on it for half a year (I’ve been watching only movies) and I’ve decided to play. I had 5.50 Prometheus software. I was unable to play me Fifa 11 copy (my PSP freezes), the same with God of War… It works till the hint about red orbs…
I reflashed flash1, uprgaded software to 6.60 ME. Didn’t help. Some time ago (year or two) I played the same copy of God of War and it worked fione.
The PSP freezes also during surfing the net.
What do I have to do?
Answer #1
i have 6.39 pro b8 on mine and fifa n gow works nice
Answer #2
I’m sure it works – it’s not problem with software, I suppose. It’s something about my PSP…
Answer #3
Update to 6.60-pro
http://wololo.net/wagic/cfw4dummies/