help to unlock ZTE AC8710 CDMA 1X EVEDO

i want to unlock my modem ZTE AC 8710 CDMA. with a Workshop CDMA but when i enter six digits 000000 in SPC, take me an error " spc invalid"
can you help me in this or comment i have the realy SPC for my modem.
and thanks.
FCC ID : Q78-AC8710
S/N 412830410720 ESN : 11EFF122