Is it possible to query post orderby wpdiscuz rating?

Hello,

I want to query post orderby the post meta of wpdiscuz rating, but not work. How should i do? I used the code below:

    $args = array(
        'post_type' => 'product', 
        'showposts' => 10, 
'meta_key' => 'wpdiscuz_rating_count',
'orderby' => 'meta_value_num', 	
		'order' => 'DESC',	
        'tax_query' => array(
            array(
                'taxonomy' => 'brand',
                'terms' => none, 
				
                ),
            )
        );
    $my_query = new WP_Query($args);
    if( $my_query->have_posts() ) {
        while ($my_query->have_posts()) : $my_query->the_post();