I created a new account role (Admin > Permissions > Account Roles) earlier this week.

Now I would like to assign this role to users, so I navigate to Admin > Settings > Admins, scroll to the bottom of the page and click the "+ Account Admins" button. Two fields appear. The first is labeled "Add More" and lists the Account Roles, but my new role isn't there.

What do I need to do in order for the new Account Role to appear in this list?