hawei vky-l29 repair boot

hi sigma team

i have huawei vky-l29 dead after flash

i do test point and new com appeared

when i try flash factory rom skf it gaves

SigmaKey 2.29.06 HiSi: Write firmware
?HUAWEI USB COM 1.0 (COM168)?, Provider: HUAWEI Incorporated, Driver ver.: 2.0.6.725, Date: 24/01/37, USB\VID_12D1&PID_3609&REV_0100
Repairing...HLVKYAL00M00A048.skf
Connect this phone in FastBoot mode and retry operation