j321az unlock faild

Welcome to Octoplus/Octopus Box Samsung software version 2.3.0
To connect SM-J320FN phone you have to perform the following steps:
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: COM9
Selected model: SM-J320FN
Detected phone model: SM-J321AZ
Firmware compiled date: Fri Mar 4 15:42:16 KST 2016
PDA version: J321AZTUU1APC4
CSC version: J321AZAIZ1APC4
SW version: J321AZTUU1APC4
Phone SN: R28H348NR6E
Android version: 6.0.1 (MMB29K)
Country: USA
HW platform: exynos3
HW Chip: exynos3475
HW Modem: SHANNON308
Codename: j3xltetuz
Connecting to phone’s modem port, please wait…
Found phone on COM400
Unlocking phone. This can take some time. Please wait…
Phone unlocking failed
Performed by 2.3.0 software version