BLA-LO9 always error on board file

phone was bricked while downgrade ..
now getting this error.
SigmaKey 2.29.15 HiSi: Write firmware
HUAWEI USB COM 1.0 (COM280), Provider: HUAWEI Incorporated, Driver ver.: 2.0.6.725, Date: 06-Nov-15, USB\VID_12D1&PID_3609&REV_0100
Repairing...BLA-A09-BD 1.0.0.36.skf
Sending boot....Error B00720AA