GD Star Rating – Query

I thought it was possible to query posts according to values from GD Star Rating. Unfortunately I can’t buy support from them. But perhaps anyone here could give me a hint. My query-string goes like this:
<?php query_posts('gdsr_sort=rating&sort_order=asc&gdsr_multi=1&showposts=5&cat=3,5'); ?>
But this query just bring up the latest posts, not taking any mention of the ratings given to the posts.