Need help Bootloop and Error flash with Flastool

I get a Bootloop while flash rom CM12.1 09/19 nightly
then I try to flash through Flashtool but get this:
20/050/2015 12:50:39 - INFO - Device disconnected
20/050/2015 12:50:41 - INFO - Selected Bundle for Sony Xperia SP (C5302). FW release : 12.1.A.1.205. Customization : India
20/050/2015 12:50:41 - INFO - Preparing files for flashing
20/051/2015 12:51:14 - INFO - Please connect your device into flashmode.
20/051/2015 12:51:35 - INFO - Device connected in flash mode
20/051/2015 12:51:35 - INFO - Opening device for R/W
20/051/2015 12:51:35 - INFO - Reading device information
20/051/2015 12:51:35 - INFO - Phone ready for flashmode operations.
20/051/2015 12:51:35 - INFO - Opening TA partition 2
20/051/2015 12:51:35 - INFO - Current device : Unknown: Jan 19 2014/22:13:32 - YT9108RRAP - Unknown: Jan 19 2014/22:13:32 - Unknown: Jan 19 2014/22:13:32 - Unknown: Jan 19 2014/22:13:32
20/051/2015 12:51:35 - INFO - Closing TA partition
20/051/2015 12:51:35 - INFO - Start Flashing
20/051/2015 12:51:35 - INFO - Processing loader.sin
20/051/2015 12:51:35 - INFO - Checking header
20/051/2015 12:51:35 - INFO - Flashing data
20/051/2015 12:51:40 - INFO - Loader : S1_Root_7054 - Version : R5G006 / Boot version : R11B023 / Bootloader status : ROOTED
20/051/2015 12:51:40 - INFO - Max packet size set to 64K
20/051/2015 12:51:41 - INFO - Ending flash session
20/051/2015 12:51:41 - ERROR -
20/051/2015 12:51:41 - ERROR - Error flashing. Aborted
20/051/2015 12:51:41 - INFO - Device connected in flash mode
20/051/2015 12:51:42 - INFO - Device disconnected
Any suggest or ideal for this issue ???