404 Error with Custom Post Types and Taxonomy

I am creating a website for a real-estate agent and have encountered an issue which I assume is Custom Taxonomy and Post Types.

Custom Post Type: Property
Taxonomy: District
Example URL: www.mywebsite.com/listing/[district]/[title], www.mywebsite.com/listings/kandy/house1

Current Situation: It works, but when I go to www.mywebsite.com/listings I get a 404 error. I expect to show all ‘Property’ type posts here.

I then made a custom page name (slug) ‘listings’ hoping to give it a template that is similar to the blog that users can brows up and down. But still it shows 404 error.

(WordPress.org and StackExchange got me up to here, but I am kind of lost at the moment, which I thought of asking the question.)

Code is a mess, but here is what I got so far:

add_action( 'init', 'create_post_type' );

function create_post_type() {

    register_post_type('post_mozeej_property', 
        array (
            'labels' => array (
                'name' => __('Properties'),
                'singular_name' => __('Property'),
                'add_new' => __('Add New'),
                'add_new_item' => __('Create New Property'),
                'edit' => __('Edit'),
                'edit_item' => __('Edit Property'),
                'new_item' => __('New Property'),
                'view' => __('View Properties'),
                'view_item' => __('View Property'),
                'search_items' => __('Search Properties'),
                'not_found' => __('No properties found'),
                'not_found_in_trash' => __('No properties found in trash')
            ),
            'description' => __('Add new real-estate property from here!'),
            'public' => TRUE,
            'show_ui' => TRUE,
            'capability_type' => 'post',
            //'supports' => array('title', 'editor', 'author', 'thumbnail', 'excerpt', 'comments'),
            'publicly_queryable' => TRUE,
            'exclude_from_search' => FALSE,
            //'menu_icon' => get_stylesheet_directory() . '/images/property_icon.png',
            '_builtin' => false,
            'rewrite' => array( 'slug' => 'listings/%tx_mozeej_district%', 'with_front' => true ),
            'query_var' => true
        )
    );


    $labels = array(
        'name' => _x( 'CR Districts', 'taxonomy general name' ),
        'singular_name' => _x( 'CR District', 'taxonomy singular name' ),
        'search_items' =>  __( 'Search CR Districts' ),
        'all_items' => __( 'All CR Districts' ),
        'parent_item' => __( 'Parent CR Districts' ),
        'parent_item_colon' => __( 'Parent CR Districts:' ),
        'edit_item' => __( 'Edit CR District' ), 
        'update_item' => __( 'Update CR District' ),
        'add_new_item' => __( 'Add New CR District' ),
        'new_item_name' => __( 'New CR District Name' ),
        'menu_name' => __( 'CR District' ),
    );    

    register_taxonomy('tx_mozeej_district', array('post_mozeej_property'), array(
        'hierarchical' => TRUE,
        'labels' => $labels,
        'show_ui' => TRUE,
        'query_var' => TRUE,
        //'rewrite' => true,
        'rewrite' => array( 'slug' => '', 'with_front' => TRUE ),
    ));

    function filter_post_type_link($link, $post) {
        if ($post->post_type != 'post_mozeej_property')
            return $link;

        if ($cats = get_the_terms($post->ID, 'tx_mozeej_district'))
            $link = str_replace('%tx_mozeej_district%', array_pop($cats)->slug, $link);

        return $link;
    }

    add_filter('post_type_link', 'filter_post_type_link', 10, 2);

}

Have I done any thing wrong? Will be great if some one can help me.

Thanks in advance!