How to unlock this tablet…urgent help needed

SigmaKey v.2.19.00
350214564 Sigma dongle 2.19, Initializing…OK
Pack 1: Activated
Pack 2: Activated
——— 2016-09-30 12:34:31 ———
SigmaKey 2.19.00 ADB: Get unlock codes
* daemon not running. starting it now *
* daemon started successfully *
^ Android ADB Interface
Version: Linux version 3.0.8+ (hid@tablet_server) (gcc version 4.4.3 (GCC) ) #1 PREEMPT Tue Jul 2 02:36:05 CST 2013
Phone model: HUAWEI MediaPad 7 Lite
Android 4.0.3; Firmware: HuaweiMediaPad; Date: Mon Jul 1 20:43:00 CST 2013
Version: S7-931uV100R001C249B001
Baseband Firmware: 11.815.00.15.00
Please ROOT the phone first!

——— 2016-09-30 12:35:42 ———
SigmaKey 2.19.00 ADB: Obtain root privileges (Method #1)
* daemon not running. starting it now *
* daemon started successfully *
^ Android ADB Interface
Version: Linux version 3.0.8+ (hid@tablet_server) (gcc version 4.4.3 (GCC) ) #1 PREEMPT Tue Jul 2 02:36:05 CST 2013
Phone model: HUAWEI MediaPad 7 Lite
Android 4.0.3; Firmware: HuaweiMediaPad; Date: Mon Jul 1 20:43:00 CST 2013
Version: S7-931uV100R001C249B001
Baseband Firmware: 11.815.00.15.00
Android Version: 4.0.3 "Ice Cream Sandwich"
Obtaining root privileges…Unsupported

——— 2016-09-30 12:36:22 ———
SigmaKey 2.19.00 ADB: Obtain root privileges (autodetect)
* daemon not running. starting it now *
* daemon started successfully *
^ Android ADB Interface
Version: Linux version 3.0.8+ (hid@tablet_server) (gcc version 4.4.3 (GCC) ) #1 PREEMPT Tue Jul 2 02:36:05 CST 2013
Phone model: HUAWEI MediaPad 7 Lite
Android 4.0.3; Firmware: HuaweiMediaPad; Date: Mon Jul 1 20:43:00 CST 2013
Version: S7-931uV100R001C249B001
Baseband Firmware: 11.815.00.15.00
Android Version: 4.0.3 "Ice Cream Sandwich"
Obtaining root privileges…Unknown firmware. Please try various rooting methods from the list.

——— 2016-09-30 12:37:09 ———
SigmaKey 2.19.00 ADB: Obtain root privileges (Method #2)
* daemon not running. starting it now *
* daemon started successfully *
^ Android ADB Interface
Version: Linux version 3.0.8+ (hid@tablet_server) (gcc version 4.4.3 (GCC) ) #1 PREEMPT Tue Jul 2 02:36:05 CST 2013
Phone model: HUAWEI MediaPad 7 Lite
Android 4.0.3; Firmware: HuaweiMediaPad; Date: Mon Jul 1 20:43:00 CST 2013
Version: S7-931uV100R001C249B001
Baseband Firmware: 11.815.00.15.00
Android Version: 4.0.3 "Ice Cream Sandwich"
Obtaining root privileges……..Failed