mate7-L09 unlock error

2016-03-02 21:36:27.797 Open port COM15 (Android Adapter PCUI (COM15))…
2016-03-02 21:36:27.927 Connecting to server…
2016-03-02 21:36:28.717 Connected!
2016-03-02 21:36:28.727 Read data from server…
2016-03-02 21:36:30.077 Read data from server success!
2016-03-02 21:36:30.087 Unlocking start
2016-03-02 21:36:30.097 Read secure info…
2016-03-02 21:36:30.727 Read secure info success!
2016-03-02 21:36:30.737 Read basic info…
2016-03-02 21:36:34.547 Read basic info success!
2016-03-02 21:36:34.557 Phone secure identify start
2016-03-02 21:36:35.237 Phone secure identify fail!
AT command error
2016-03-02 21:36:35.257 Unlocking Fail!
AT command error
2016-03-02 21:36:35.277 ERROR!
AT command error

what should i do ?