z3+ ou z4 Bootloader crash

Hi everyone, I already installed a version of the nosou nougat in my x3 x3 + dual e6533 xperia ... so I faced some bugs mainly the chips yes they did not work ok, I decided then to take that version and return to a 6.0 stockrom of the time. What I wonder is that today has a LineageOS, and as a good cyanogenmod tester, this can not be left out ... but I'm having a big problem ... when I came back to unlock the bootloader of this device ... Flashtool Not the message that the process has been completed ... I disc no dialer the codes to enter the menu and check if this is unlocked but does not appear in the bootloader anything ... listing so being when the fastboot recovery recovery flash command. Img of COMMAND FAILED NOT VERY MUCH ... ... needs help from those who handle tale with you ... a big hug. im wait for help