downgrding

plz help me guys, i have used both tutorials , one with http://forums.dashhacks.com/f133/the-downgrade-your-psp-without-pandora-mega-thread-t270030/ with its 2nd method and the http://forums.dashhacks.com/f133/downgrading-from-firmware-6-3x-to-firmware-6-t296612/ but when ever i put the...