Does ftf means Firmware? is this the right download link?:
http://xperiadownload.cz/index.php/xperiadownload/file/102-l
I tried Flashing without ftf(I don't know what is that) and these happend
12/017/2013 23:17:10 - INFO - Device connected in fastboot mode
12/030/2013 23:30:05 - INFO - Unlocking phone using key 19230B5BBD9947C3
12/030/2013 23:30:06 - INFO - ...
12/030/2013 23:30:06 - INFO - OKAY [ 0.065s]
12/030/2013 23:30:06 - INFO - finished. total time: 0.066s
12/030/2013 23:30:06 - INFO - Device will reboot into system now
12/030/2013 23:30:06 - INFO - Unlock code saved to C:\Flashtool\custom\mydevices\ZH8000EQ4P\ulcode.txt
12/030/2013 23:30:07 - INFO - Device disconnected
12/030/2013 23:30:17 - INFO - Device connected with USB debugging off
12/030/2013 23:30:17 - INFO - For 2011 devices line, be sure you are not in MTP mode
12/033/2013 23:33:09 - INFO - Selected X10 / V1 / BLRelock
12/033/2013 23:33:10 - INFO - Preparing files for flashing
12/033/2013 23:33:10 - INFO - Please connect your device into flashmode.
12/033/2013 23:33:15 - INFO - Device disconnected
12/033/2013 23:33:48 - INFO - Device connected with USB debugging off
12/033/2013 23:33:48 - INFO - For 2011 devices line, be sure you are not in MTP mode
12/034/2013 23:34:08 - INFO - Device disconnected
12/034/2013 23:34:27 - INFO - Opening device for R/W
12/034/2013 23:34:27 - INFO - Device connected in flash mode
12/034/2013 23:34:27 - INFO - Reading device information
12/034/2013 23:34:27 - INFO - Unable to read from phone after having opened it.
12/034/2013 23:34:27 - INFO - trying to continue anyway
12/034/2013 23:34:27 - INFO - Start Flashing
12/034/2013 23:34:27 - INFO - Processing loader.sin
12/034/2013 23:34:27 - INFO - Checking header
12/034/2013 23:34:27 - INFO - Ending flash session
12/034/2013 23:34:27 - ERROR - Error in processHeader : 6 : The handle is invalid.
12/034/2013 23:34:27 - ERROR - Error flashing. Aborted
12/034/2013 23:34:27 - INFO - Device connected in flash mode
12/034/2013 23:34:52 - ERROR - This action needs a connected device in ADB mode
12/035/2013 23:35:01 - ERROR - This action can only be done in fastboot mode
12/035/2013 23:35:18 - INFO - Selected X10 / V1 / BLRelock
12/035/2013 23:35:18 - INFO - Preparing files for flashing
12/035/2013 23:35:18 - INFO - Please connect your device into flashmode.
12/035/2013 23:35:19 - INFO - Opening device for R/W
12/035/2013 23:35:20 - INFO - Device connected in flash mode
12/035/2013 23:35:20 - INFO - Reading device information
12/035/2013 23:35:20 - INFO - Unable to read from phone after having opened it.
12/035/2013 23:35:20 - INFO - trying to continue anyway
12/035/2013 23:35:20 - INFO - Start Flashing
12/035/2013 23:35:20 - INFO - Processing loader.sin
12/035/2013 23:35:20 - INFO - Checking header
12/035/2013 23:35:20 - INFO - Ending flash session
12/035/2013 23:35:20 - ERROR - Error in processHeader : 6 : The handle is invalid.
12/035/2013 23:35:20 - ERROR - Error flashing. Aborted