Default [Q] No NAM file

Hello I am trying to change the min, sid, and mdn of my xt901 so it can be on Pageplus. I dialed " #073887* ", then 000000, and selected user activation. I get a message saying, "failed to get call NAM infrormation." There are two fields that said, "Cache Start-Up." I can not hit done. I left the fields blank and tried just put six 0 's down. What do I do for it to allow me to hit done?