Flashtool won't recognize my device

This is what I get but flashing fails:

26/013/2015 19:13:41 - INFO - Selected Bundle for Sony Xperia Z2 (D6503). FW release : 23.0.1.A.0.167. Customization : Customized_AU
26/013/2015 19:13:41 - INFO - Preparing files for flashing
26/013/2015 19:13:55 - INFO - Please connect your device into flashmode.
26/013/2015 19:13:55 - INFO - Opening device for R/W
26/013/2015 19:13:55 - INFO - Reading device information
26/013/2015 19:13:55 - INFO - Phone ready for flashmode operations.
26/013/2015 19:13:55 - INFO - Opening TA partition 2
26/013/2015 19:13:55 - INFO - Current device : Unknown: Jul 11 2014/20:13:05 - BH907ESZ16 - Unknown: Jul 11 2014/20:13:05 - Unknown: Jul 11 2014/20:13:05 - Unknown: Jul 11 2014/20:13:05
26/013/2015 19:13:55 - INFO - Closing TA partition
26/013/2015 19:13:55 - INFO - Start Flashing
26/013/2015 19:13:55 - INFO - Processing loader.sin
26/013/2015 19:13:55 - INFO - Checking header
26/013/2015 19:13:55 - INFO - Flashing data
26/013/2015 19:13:57 - INFO - Loader : S1_Root_9c84 - Version : MSM8974AB_22 / Boot version : S1_Boot_MSM8974AB_LA3.0_55 / Bootloader status : ROOTED
26/013/2015 19:13:57 - INFO - Transfer buffer size : 262144
26/013/2015 19:13:57 - INFO - Parsing boot delivery
26/013/2015 19:13:57 - INFO - You must have the according fsc script to flash this device.
26/013/2015 19:13:57 - INFO - Flashing finished.
26/013/2015 19:13:57 - INFO - Please unplug and start your phone
26/013/2015 19:13:57 - INFO - For flashtool, Unknown Sources and Debugging must be checked in phone settings