i tried to unlock but cant unlock vadofone v895n

SigmaKey 2.19.04b1 Qcom: Direct unlock
Android HS-USB Diagnostics AF02 (COM51), Provider: TCL, Driver ver.: 6.0.0.0, Date: 8/7/2014, USB\VID_1BBB&PID_AF02&REV_0225&MI_00
Phone model: OT-V895N / VF-895N
Connecting….Phone not found
——— 2016-10-22 02:33:43 ———
SigmaKey 2.19.04b1 Qcom: Direct unlock
Android HS-USB NMEA AF02 (COM52), Provider: TCL, Driver ver.: 6.0.0.0, Date: 8/7/2014, USB\VID_1BBB&PID_AF02&REV_0225&MI_03
Phone model: OT-V895N / VF-895N
Error writing to serial port