fastboot write imei command doesnt work in my htc one

my phone is htc one e9+ and its rooted , supercid , s-off and unlocked . But still i cant write fastboot oem writeimei code in cmd . It says FAILED unknown command everytime . Is there anyone can help me ? :D

from xda-developers http://ift.tt/20kVb1w
via IFTTT