Users to edit own posts?
I am trying to fathom roles and permissions but I think I need a little help. I'd like users to be able to edit their own posts for 1hr. I can see the drop down list in advance but it won't stay on any of the options apart from 'users may never edit'. When selecting another option, you click save, go off the page and back again and it returns to users may never edit.
I have tried to set the edit in the roles and permissions but it allows users to edit all posts.
Can anyone here give me any instruction as to how to allow users to edit their own posts only please?