v6.1/v4.3.5 ent.

We want to enable our registered users the ability to edit and delete their own forum posts. In the security tab for the forum, we checked both Edit and Delete for registered users. Those options now appear at the top of each post/reply. Edit works fine. But, when a user tries to delete their post or reply, they are prompted to confirm the action, and then the post/reply is not deleted.

As an admin on the site, this works fine for me, but not for standard users, even though they see the option and are even prompted to confirm the action. Am I missing a setting somewhere? Thanks!