Custom Post Types not working

I have added some code to my functions file and uploaded it to my server, and I can now see the appropriate post type in my left hand bar in the admin area, and I’m able to add posts to it – but I’m unable to view them!

When I click them I get my 404 page, but the URL looks correct.

Here is the code I’ve been using:

//custom post type

add_action( 'init', 'create_post_type' );
function create_post_type() {
	register_post_type( 'test_product',
		array(
			'labels' => array(
				'name' => __( 'Test' ),
				'singular_name' => __( 'Test' )
			),
			'public' => true,
			'has_archive' => true,
			'rewrite' => array('slug' => 'test'),
		)
	);
}