Just found the cause..
Actually i choose for my posts do not show the publishing data..
I simply choose to show in d.m.y and issue solved..
It doesn’t work for “post” or “pages”.I try both.
I choose “last modified under “Custom”.
Column appear in the posts overview,but it’s empty.
I check another options,like words number and that work just fine.
The “Last modified” option don’t..
