Default [Q] Help SCH-R720 won't allow writting 6 zeros

Hi There
I am trying to get my SCH-R720 to accept 000000 spc. It is on metro pcs so when I connect to CDMA Workshop and write the spc code it unlocks successfully the I go to write 000000 it shows it has written successful but when I go to send 000000 it does not accept it. anyone have experience or idea how to get it to accept the zeros? Thanks