C902 get error when repair securiety blocks

[tirum]

hi

i get error when i unlock repair securiety blocks with dreambox
please check this log asking device key when i mack cancel come this error

--- Unlock and Repair----------------------------------------------------------
User selected phone C902 using DCU60 boot mode
1) Turn OFF the phone.
2) Hold <2>+<5> buttons and connect the phone to DCU60 cable.
Boot Responce = 7A
Processor ID = C9000401FFFFFFFF (DB3150)
Booting via ROM ...
Color = 4 : RED
CID = 52
OTP IMEI = 357149-02-******-*
OTP Status = LOCKED
NAND Flash ID: 00EC 00A1
Device Key : FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF
Processing P96 authorisation...
Restarting the phone...
Booting via ROM ...
Writing SEMCBOOT...
Writing default simlock units...
Setting Control Keys...
Error : Failed.

please check GSM Dream what is problem
thanx
br
tirum