how to flash asus x99 deluxe U3.1 uefi bios updater?

i update my x99 deluxe u3.1 bios!but mod bios cant use ezflash flash it!please help me!
selected file is not a proper bios error!

@chenzhuops2 :
Welcome at Win-RAID Forum!

ASUS’s BIOS protection prevents, that you can flash any modded BIOS by using the regular BIOS tools like EZ Flash.
You can find the solution for your problem within the start post of >this< thread.

Regards
Dieter (alias Fernando)

Flash with ASUS USB BIOS FLASHBACK

@zr1971jp :
Welcome at Win-RAID Forum!

Yes, that is exactly what has been written into the post I had linked to.

Regards
Dieter (alias Fernando)

THX