Samsung Galaxy S5 AT&T Unlock failed.

Welcome to Octoplus/Octopus Box Samsung software version 2.1.4
Platform: Samsung Android
Selected port: COM197
Selected model: SM-G900A
Reading info…
Mode: Normal
Firmware compiled date: Aug 27 2015
Firmware compiled time: 00:00:00
Firmware released date: Sep 22 2015
Firmware released time: 20:51:56
SW Version: MPSS.DI.2.0.1.c2-00185-M8974AAAAANRZM-1
Please, press "OK" button on the phone to allow USB debugging..
Detected phone model: SM-G900A
Firmware compiled date: Tue Sep 22 21:38:37 KST 2015
PDA version: G900AUCU4COI5
CSC version: G900AATT4COI5
SW version: G900AUCU4COI5
Phone IMEI: Unknown
Phone SN: R38G3031HMJ
Android version: 5.1.1 (LMY47X)
Checking Root:
Phone is not Rooted.
Unlocking phone…
Phone will restart now. Please don’t disconnect cable!
Phone is successfully unlocked
To finish the operation, please restart the phone via phone’s menu.

But Still Locked. ( unlock code want )