ASUS VX248H EDID Flash Failure

Hello i've tried to flash the EDID of my ASUS VX248H monitor but i can't i get write permission denied, i've read a topic where a guy says that he turn BURN IN mode to ON and it enables EDID Write Permission but it does just not work with my monitor, i also have no such option to enable EDID Write Permission on service menu.


Does anyone know a way to enable Write Permission on this monitor ?

Thanks

Service menu picture: