the keys.bin file is created after running it for the first time on an OE firmware. If you ran it before you were on OE (like on 3.03, or even through devhook), you have to delete the old one then transfer it again, then keys.bin should be made. If you were to call sony they would probably ask you to send your psp in for repairs, then force the 3.11 update on it because that keys.bin file has been redirected from flash2 to ms0 (thats my guess) on custom firmware