Z970 unlock problem

i have this problem unlocking z970, already tried rooted and also diag port enabled by sigma because code not work


SigmaKey 2.14.02 ADB: Direct unlock
* daemon not running. starting it now *
* daemon started successfully *
^ ZTE Handset ADB Interface
Version: Linux version 3.4.0-g1af7f82 (xueyibing@scm12) (gcc version 4.7 (GCC) ) #1 SMP PREEMPT Tue Aug 18 23:35:33 CST 2015
Phone model: zte Z970
Android 4.4.4; Firmware: KTU84P; Date: Tue Aug 18 23:17:24 CST 2015
Version: Z970_MetroPCSV1.0.0B13
Baseband Firmware: .3.0.c9.6-00021-M8926DAAAANAZM-1
Obtaining root privileges...NO
Preparing....Reconnect phone and try again