Asus Z170 Pro Gaming Microcode Problem


I tried to patch the latest 1102 Bios for my Z170 Pro Gaming MB. UBU Microsode Patching (Microcode 56) is working fine, but when
i try to flash it i am getting a security error: "Can´t establish secure flash connection". I tried with afudos (dos based) and aufudos emergency.
No go at all. Seems like the Asus Bioses are somehow "locked" ? Whats the take here ?

Thanks in advance.

Is there really no one who can help me?