FAILED (remote: unlock token check failed) topic

HI,
My motherboard was swapped few months ago.
From that moment I can't unlock my bootloader with your tool on htcdev.com
My device details:
Software number: 3.28.163.1
I STUCK ON THIS PART after I followed steps on htcdev.com :
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c:\fst>fastboot flash unlocktoken Unlock_code.bin
sending 'unlocktoken' (0 KB)...
OKAY [ 0.146s]
writing 'unlocktoken'...
FAILED (remote: unlock token check failed)
finished. total time: 0.161s
Thanks for Helps