Custom Post Type Template not working

I used the following to register the post type

function create_estate_sales_post_type() {
$eslabels = array(
'name' => 'Estate Sales',
'singular_name' => 'Estate Sale',
'add_new' => 'Add New Sale',
'add_new_item' => 'Add New Sale',
'edit_item' => 'Edit Sale',
'new_item' => 'New Sale',
'all_items' => 'All Sales',
'view_item' => 'View Sale',
'search_items' => 'Search Sales',
'not_found' => 'No Sales Found',
'not_found_in_trash' => 'No Sales found in Trash',
'parent_item_colon' => '',
'menu_name' => 'Estate Sales',
);
register_post_type( 'estate-sales', array(
'labels' => $eslabels,
'has_archive' => true,
'public' => true,
'supports' => array( 'title', 'excerpt', 'thumbnail' ),
'taxonomies' => array( '' ),
'exclude_from_search' => false,
'capability_type' => 'post',
'rewrite' => array( 'slug' => 'estate-sales' ),
)
);
}

single-estate-sales.php does not work, archive-estate-sales.php does not work.