samsung p3100 firmware upgrade error

set connecting ok scaning ok but firmware upgrade error

File Author: ATF Team @ X-Shadow
Date Created: 29/06/2015 (dd/mm/yyyy)
Description: Samsung eMMC Firmware
eMMC Part Number: KLMAG2GE4A-A002
eMMC Product Name: MAG2GA
eMMC Product Rev: 0.7

Preparing eMMC for Firmware Update…
ERROR: CUSTOM_VENDOR_COMMAND FAILED 0x03
Total Elapsed Time 00:00:00