flashing l21 probem

hi guys can someone hlep how to flash this phone
load firmware then stop on get andriod fastboot devices


>search android fastboot devices...
>>>>Get android fastboot devices...
Mobile Name: :ALE-L21
Mobile Set BL Lock state:ommand not allowed
Trying First Way for Get the Unlock code
Read Mobile Dynamic unlock code Fail
Trying Second Way for Get the Unlock code
Dynamic unlock code:03ff1e1yunaced Bootloader Temporary Unlock Done
tip:Bootloader Temporary after reboot will lock again
>>>>search android fastboot devices...
>>>>Get android fastboot devices...