Default [Q] Update firmware Xperia Z1C with CWM 6.0.6.4

Hello,

please can you tell me how to update firmware to 14.3.A.0.757 on my Z1C with CWM 6.0.6.4 and unlock bootloader?
SUS and PC Companion do not use and flashtool stop at this:
16/012/2014 11:12:58 - DEBUG - (USBFlashWin32.java:51) - Reading packet from phone

Please can you help me with update to new firmware?


Thank you very much for your help.

Lukas