Do you use Loader ? I modified your bios with HP 2.1 Slic, but you have shown Asus 2.1 Slic. Remove any Loaders and check again.
The BIOS File is named: p55us3l2.fh Make a Bootable USB Drive and copy the files from the Rar archive to that Bootable USB and re-boot with USB Drive set as Firts Boot Device in Bios Settings. Then the autoexec.bat wil auto flash the Bios.