its permanent, use 0604 mod from me, than official 0612 from asus, slic remain i dont know what mistake you are doing, or you can use DYNAMIC (not permanent) did you choose key file?
can I get a re-upload of this bios the link is dead All SLICs 2.x (Modded Bios List) - Note: For requests use 'Bios Mod Requests' section