G316ML unlock failed

Welcome to Octoplus/Octopus Box Samsung software version 2.2.0
To connect SM-G316ML phone you have to perform the following
1. Disconnect USB cable from phone.
2. Go to Menu->Settings->More->About Device.
3.Tap on "Build number" 7 times to enable developer options.
4. Go to Menu->Settings->More->Developer options.
5. Turn on "USB Debugging" option.
Platform: Samsung Android
Selected port: COM22
Selected model: SM-G316ML
Detected phone model: SM-G316ML
Firmware compiled date: Fri Jan 16 14:02:45 KST 2015
PDA version: G316MLUBU0AOA5
CSC version: G316MLUWA0AOA7
SW version: G316MLUBU0AOA7
Phone IMEI: 357938065449068
Phone SN: R21G93L9RXH
Android version: 4.4.4 (KTU84P)
Connecting to phone’s modem port, please wait…
Phone unlocking failed

pls help