Error unlock XT914

Dear team im try to unlock this phone but always show me this error

in 2 different pc an nothing

SigmaKey 2.14.03b2 ADB: Liberación directa
* daemon not running. starting it now *
* daemon started successfully *
^ Android ADB Interface
Versión: Linux version 3.4.67 (administrator@ubuntu96.arimacomm.com.tw) (gcc version 4.7 (GCC) ) #1 PREEMPT Thu Jan 8 11:58:09 CST 2015
Modelo del teléfono: motorola XT914
Android 4.4.2; Firmware: 3_220_2012; Fecha: Thu Jan 8 12:03:54 CST 2015
Versión: 3_220_2012
Flasheo de banda de base: MAUI.11AMD.W12.22.SP.V21.F3.P, 2014/12/02 15:54
Procesador Baseband: MT6575
Leyendo IMEI de hardware….Error de inicio de driver