error unlocking ZTE Z970

——— 2016-04-30 11:04:02 ———
SigmaKey 2.17.01 ADB: Direct unlock
* daemon not running. starting it now *
* daemon started successfully *
^ ROMaster Composite ADB Interface
Version: Linux version 3.4.0-g1af7f82 ([email protected]) (gcc version 4.7 (GCC) ) #1 SMP PREEMPT Fri Jul 31 12:22:25 CST 2015
Phone model: zte Z970
Android 4.4.4; Firmware: KTU84P; Date: Fri Jul 31 12:03:24 CST 2015
Version: Z970_MetroPCSV1.0.0B12?????
Obtaining root privileges…NO
Preparing….Reconnect phone and try again