New to WordPress, I've been trying to create an archive page for a custom post type, and when I click the link to `localhost/websitename/wordpress/archive-event.php` I get a 404. Here is my code to register the post type:

```
add_action('init', 'event_register');

function event_register() {

    $labels = array(
        'name' => _x('Events', 'post type general name'),
        'singular_name' => _x('Event', 'post type singular name'),
        'add_new' => _x('Add New', 'event'),
        'add_new_item' => __('Add New Event'),
        'edit_item' => __('Edit Event'),
        'new_item' => __('New Event'),
        'view_item' => __('View Event'),
        'search_items' => __('Search Events'),
        'not_found' =>  __('Nothing found'),
        'not_found_in_trash' => __('Nothing found in Trash'),
        'parent_item_colon' => ''
    );

    $args = array(
        'labels' => $labels,
        'public' => true,
        'publicly_queryable' => true,
        'show_ui' => true,
        'query_var' => true,
        'rewrite' => array('slug' => 'event'),
        'has_archive' => 'event',
        'capability_type' => 'post',
        'hierarchical' => false,
        'menu_position' => null,
        'supports' => array('title','editor','thumbnail'),
    ); 

    register_post_type( 'event' , $args );

}

```

I've tried having `rewrite => true`, `has_archive => true`, flushing the rewrite rules, and even registering a taxonomy for the post type. `single-event.php` works fine. What now?