problem with 7024w

Hello I unlock an 7024w but when restart phone ask for unlock code again, I unlock many times and always ask unlock code. I try direct unlock but also is impossible root this unit. I try hard reset and wipe all user data and process is ok but when restart phone is like never has reset it, same lock screen, user old pics, etc. I try to use this file from support 7024t_7024w_7024n_reset_userdata_simlock.rar but got an error when try emmc format. Is ther some specials hints for use 7024t_7024w_7024n_reset_userdata_simlock.rar???

thanks in advance