Conditional wp_enqueue with is_page_template

Hello all,

I am trying to do a conditional enqueue of scripts, to cut down on load time, but this code in functions.php does not seem to be working and I can’t figure out what it is that I’m missing. The non-conditional scripts are enqueuing, but the conditional ones arent loading on the pages they are supposed to, or any pages at all, for that matter.

Any help is appreciated. Thanks.

function my_ck_scripts()
{
	wp_register_script ('jquerymin', 'https://ajax.googleapis.com/ajax/libs/jquery/1.7.1/jquery.min.js');
	wp_register_script ('jqueryui', 'https://ajax.googleapis.com/ajax/libs/jqueryui/1.8/jquery-ui.min.js');
	wp_register_script( 'caseykaplan', get_template_directory_uri() . '/js/ck.js');
	wp_enqueue_script('jquerymin');
	wp_enqueue_script('jqueryui');
	wp_enqueue_script('caseykaplan');

    if(is_page_template( array('archive-news.php', 'archive-exhibitions.php', 'category-art-fairs.php', 'category-artist-news.php', 'category-events.php', 'category-gallery-news.php', 'category-upcoming.php') )) {
            wp_register_script('masonry', get_template_directory_uri() . '/js/jquery.masonry.min.js');
            wp_enqueue_script('masonry');
    }

     if(is_page_template( array('exhibition-images-page.php', 'artist-images-page.php') )) {
            wp_register_script('bxslider', get_template_directory_uri() . '/js/jquery.bxSlider.min.js');
            wp_enqueue_script('bxslider');
    }

}

add_action('wp_enqueue_scripts','my_ck_scripts');

Josh