Problem with Custom Taxonomies

Thank you very much for this excellent plugin!

I just have an small problem, each time I try to add a custom taxonomy manually and co-authors plus is activated at the same time, the site don’t load posts and it starts cycling.

This is the code of the taxonomy:

function add_artist_taxonomy() {
	register_taxonomy('album-artist', array( 'post', 'attachment'),
      array(
		'hierarchical' => false,
		'labels' => array(
			'name' => _x( 'Artist', 'taxonomy general name' ),
			'singular_name' => _x( 'Artist', 'taxonomy singular name' ),
			'search_items' =>  __( 'Search Artist' ),
			'all_items' => __( 'All licenses' ),
			'parent_item' => __( 'Parent Artist' ),
			'parent_item_colon' => __( 'Parent Artist:' ),
			'edit_item' => __( 'Edit Artist' ),
			'update_item' => __( 'Update Artist' ),
			'add_new_item' => __( 'Add New Artist' ),
			'new_item_name' => __( 'New Artist Name' ),
			'menu_name' => __( 'Artists' ),
		),
		'rewrite' => array(
			'slug' => 'artist',
			'with_front' => false,
		),
	));
}
add_action( 'init', 'add_artist_taxonomy');

http://wordpress.org/extend/plugins/co-authors-plus/