GD Star: How to display multi average text?

i want to add the multi average text(such as: Rating: 8.5/10) after the every post title at the listpage, now i use the fuction:

<ul>
<?php query_posts("post_type=page&gdsr_sort=rating&gdsr_multi=1&sort_order=desc"); ?>
<?php if (have_posts()) : while (have_posts()) : the_post(); ?>
<li>
<div style="float:right"><?php wp_gdsr_multi_rating_average (); ?></div>
<a href="<?php the_permalink() ?>" rel="bookmark" title="Permanent Link to <?php the_title(); ?>"><?php the_title(); ?></a>
</li>
<?php endwhile; else: ?>
<?php endif; ?>
</ul>

but the stars would be shown, how can I do? How can i use the Rating: %RATING%/<strong>%MAX_RATING%</strong>? How to use?

Thanks.