1. connect the psp to your pc/laptop via the usb cable. 2. enter the recovery mode on the psp. 3. enter advanced. 4. select "Toggle USB (flash1). 5. on your pc/laptop, open "my computer" and open the psp's mem card. 6. look in the folders for the file "config.se", then delete it. 7. on the psp, select back, then exit. For some reason it worked for me! I now can play homebrew, isos and everything!