mt7-l09 big problem

I try repair imei and not success done, please help me.

2016-03-03 12:18:53.644 Autodetect started!
2016-03-03 12:18:54.304 Found COM port: COM152
2016-03-03 12:18:54.311 Open port COM152 (Android Adapter PCUI (COM152))…
2016-03-03 12:18:54.446 Connecting to server…
2016-03-03 12:18:56.085 Connected!
2016-03-03 12:18:56.090 Read data from server…
2016-03-03 12:18:57.696 Read data from server success!
2016-03-03 12:18:57.709 Repairing start
New IMEI 1 : 865276022688881
2016-03-03 12:18:57.737 Phone authorize start
2016-03-03 12:18:57.741 Phone authorize success!
2016-03-03 12:18:58.390 Read basic info…
2016-03-03 12:19:02.151 Read secure info…
2016-03-03 12:19:02.167 Repair IMEI 1 start!
2016-03-03 12:19:02.173 Phone secure identify start
2016-03-03 12:19:02.814 Phone secure identify fail!
2016-03-03 12:19:02.828 Repair IMEI 1 fail!
AT command error
2016-03-03 12:19:02.858 Finished!