SM-N915T 5.1.1 unlocking failed

halo team.
please guide me to Direct unlock
Samsung Note edge SM-N915T 5.1.1
with octoplus samsung v2.2.1


Platform: Samsung Android
Selected port: COM188
Selected model: SM-N915T
Reading info…
Mode: Normal
Firmware compiled date: Sep 25 2015
Firmware compiled time: 11:00:00
Firmware released date: Nov 9 2015
Firmware released time: 15:48:25
SW Version: MPSS.DI.3.0.c5-00436-M9625TAARANSZM-1
Detected phone model: SM-N915T
Firmware compiled date: Mon Nov 9 21:58:44 KST 2015
PDA version: N915TUVU2COK2
CSC version: N915TTMB2COK2
SW version: N915TUVU2COK2
Phone SN: R28G219823J
Android version: 5.1.1 (LMY47X)
Checking Root:
Phone is Rooted.
Reading security backup, please wait…
Backup saved as Security-SM-N915T-21-02-2016_21-15-35 file
Unlocking phone…
Phone unlocking failed
Performed by 2.2.1 software version

Thank you