need help on to set User status for Operations in Maintenance order

Hi experts,

i am new to PM module.

i need to do BDC for IW31. i want to know some inforamtion

on user status for each opertaion.

my problem is ,, what is user status.

why it is saying order is not yet released when saving and status can not set.

in this cases how can i do BDC.