[whirpoolls]

amigos eh estado intentando Flashear el Kernel con recory de DooMlord para rotear JB pero el flashear me sale este error

31/035/2013 11:35:54 - INFO - <- This level is successfully initialized
31/035/2013 11:35:54 - INFO - Flashtool Version 0.9.10.1 built on 2013-01-09 19:49:47
31/035/2013 11:35:54 - INFO - You can drag and drop ftf files here to start flashing them
31/036/2013 11:36:02 - INFO - Device connected in fastboot mode
31/036/2013 11:36:05 - INFO - Launching Fastboot Toolbox 1.0 by DooMLoRD
31/036/2013 11:36:05 - INFO - Device Status: FASTBOOT mode
31/036/2013 11:36:09 - INFO - Fetching connected device info
31/036/2013 11:36:09 - INFO - Connected device info: [ PSDN:BX903C3VLL&ZLP ]
31/036/2013 11:36:13 - INFO - Device Status: FASTBOOT mode
31/036/2013 11:36:34 - INFO - Selected kernel (boot.img or kernel.sin): C:\Users\Downloads\S_DooMLoRD_AdvStkKernel_FW-200_v2.elf
31/036/2013 11:36:34 - INFO - Flashing selected kernel
31/036/2013 11:36:34 - INFO - sending 'boot' (9288 KB)...
31/036/2013 11:36:34 - INFO - FAILED (remote: The Device must be rooted first)
31/036/2013 11:36:34 - INFO - finished. total time: 0.009s
31/036/2013 11:36:34 - INFO - FASTBOOT Output:
sending 'boot' (9288 KB)...
FAILED (remote: The Device must be rooted first)
finished. total time: 0.009s

espero me puedan ayudar!!