Flashing Error HTC 500

HI Sir,

I am trying to Flash 0P3Z – HTC Desire 500 ( Z4_DUG)

i have downloadedHTCCN CHS 1.16.1400.1
Radio 14.11.50QD.14 341610
from our XTC Website but its giving Error while flashing ( (remote: 12 signature verify fail ) I have also changed CID to Supuer CID

Can you help me in this mater.. ??? and is SOFF is required for flashing ???
Please find Attached Image of Error