940 Unlock

Hellooo

I am trying to unlock A SAGEM MC940 and i am using SAGEM MAKER by Bartek ,
i got the message below :

Removing Sp-lock, Please Wait...
Reading data... :-))))
Unlocking phone...
ERROR! Fields 251 and 191 are different.
Phone has unknown simlock method or is destroyed by wrong unlock...

Even when trying to copy field 191 in 251 everything is good
UNTIL I REBOOT THE PHONE and then the message comes back

NEED YOUR HELP to unlock this phone ????

By the way the phone is saying SIM not present even when the sim is inside ...

THANKS IN ADVANCE

DJOZEAMMA