Post Cant flash new kernel

I own a xperia sola , i want to flash the 6.1.1.b.1.10 kernel in order to root it.

when the flashtoolkit says to boot my phone into flashmode (voldown) it shows the green LED for a secend and then boot normaly into charging mod....and becuse of that i cant flash noting

*ALL DRIVERS INSTALLED AND UP TO DATE

LOG:

06/027/2014 15:27:07 - INFO - Selected mt27i_6.1.1.b.1.10_kernel.ftf
06/027/2014 15:27:07 - INFO - Preparing files for flashing
06/027/2014 15:27:07 - INFO - Please connect your device into flashmode.
06/027/2014 15:27:33 - INFO - Opening device for R/W
06/027/2014 15:27:33 - INFO - Device disconnected
06/027/2014 15:27:33 - INFO - Start Flashing
06/027/2014 15:27:33 - INFO - Processing loader
06/027/2014 15:27:33 - INFO - Checking header
06/027/2014 15:27:33 - INFO - Ending flash session
06/027/2014 15:27:33 - ERROR -
06/027/2014 15:27:33 - ERROR - Error flashing. Aborted
06/027/2014 15:27:34 - INFO - Device disconnected


Please help , thanks