Unlock Vtelca V791 Fail help

Please team check this Bug
http://huadongle.ir/Hua%20dongle%20N…odels(MTK).txt <— list supported

these is log DIRECT UNLOCK

Waiting For Device… OK[WinUSB]
Device Status: [ONLINE]
Model : V791
Manufacturer : ZTE

Serial No. : 0123456789ABCDEF
BaseBand Version :

SW Version : MVN-VE-QB125S-P175A40V1.0.2

Custom Version : V791

Android Version : 2.3.6
[GRK39F
]
Built Date : Sun Feb 17 09:30:12 CST 2013

Checking Root Permission… OK
Prepairing Exploit… OK
Prepairing… Fail! -4
Rebooting to Normal Mode… OK
Stopping ADB Service… OK
Operation Time: 00:00:38

These is log READ CODES

Waiting For Device… OK[WinUSB]
Device Status: [ONLINE]
Model : V791
Manufacturer : ZTE

Serial No. : 0123456789ABCDEF
BaseBand Version : MAUI.11AMD.W11.50.SP.V21.P1.T, 2012/11/09 12:19

SW Version : MVN-VE-QB125S-P175A40V1.0.2

Custom Version : V791

Android Version : 2.3.6
[GRK39F
]
Built Date : Sun Feb 17 09:30:12 CST 2013

Checking Root Permission… OK
Prepairing Exploit… OK
Uploading Exploit… OK..OK
Reading Locks Status… OK

SIM 2 Data Not Found! this phone is 1 SIM

Stopping ADB Service… OK
Operation Time: 00:01:03