Custom Tags Archive - permalinks not working

Question

I need to create Custom tags archive like normal tags in post_type "post".

ex: i need this http://sitename.com/mtag/test work like http://sitename.com/tag/test

add_action( 'init', 'create_mtags_taxonomy' );
function create_mtags_taxonomy() {
    $labels = array(
        'name'                           => 'More Tags',
        'singular_name'                  => 'More Tags',
        'menu_name'                      => 'More Tags',
    );
    register_taxonomy(
        'mtags',
        'post',
        array(
            'label' => __( 'More Tags' ),
            'hierarchical' => false,
            'labels' => $labels,
            'public' => true,
            'show_in_nav_menus' => false,
            'show_tagcloud' => true,
            'has_archive' => true,
            'show_admin_column' => true,
            'rewrite' => array(
                'slug' => 'mtag'
            )
        )
    );
}

Answer 1

At first glance, that should just work, as long as you've flushed your rewrite rules. You can do that by going into the settings and saving permalinks again.