Facebook private message

Hello everyone,
i have facebook page. There ara only 4000 fallower for now coz im new. i m using a bot to send private message to member of groups. i got 800 people just yesterday. but i have a problem. after a few hourse my messages goes to other box instead of inbox. but it gets okey later. im wondering how can i fix that? how can i send my private message to directly inbox ALWAYS ?


Thanks...

you could pay facebook a dollar per inbox-guaranteed message (click see more link in the PM), but that can get expensive pretty quickly.