wifi not working after root, cannot flash stock firmware (moto x style/pure xt1572)

HI,
i used this method to root my moto x style (xt1572) indian
after that
wifi stopped working....its like it stuck in off mode.....doesnt turn on

i did some researching n found that it had to do somthing with modem file

downloaded firmware from this link
http://ift.tt/21MLloN

i flashed only the modem file but didnt worked

i tried to completely flash stock firmware
got this error

mfastboot flash partition gpt.bin
target max-sparse-size: 256MB
sending 'partition' (32 KB)...
OKAY [ -0.000s]
writing 'partition'...
(bootloader) Preflash validation failed
FAILED (remote failure)
finished. total time: 0.364s

tried to do with locking bootloader

got this error

Please fully flash the signed build before locking phone



pls help :(
thnx

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