unlock failes ot-5065n please help


unlock failed

——– 2016-11-05 18:03:13 ———
SigmaKey 2.19.03 Qcom: Direct unlock
Android HS-USB Diagnostics AF02 (COM68), Provider: TCL, Driver ver.: 6.0.0.0, Date: 07/08/2014, USB\Vid_1bbb&Pid_af02&Rev_0225&MI_00
Phone model: OT-5065
Sending boot…Failed