[Plugin: Filter By Comments] How to use it?

Hi!

I installed the plugin but I could not get it work in the Loop…

After activation, in my index.php, I wrote:

< ?php get_header();  ? >

< div id="col1" >
< ?php
query_posts('orderby_last_comment', $paged);

 if (have_posts()) : while (have_posts()) : the_post(); ? >

And it seems to ignore the code, my posts are not order by last commented, there are ordered by publish date.
If it’s any help, I use this theme

Sorry for my english…

https://www.ads-software.com/extend/plugins/filter-by-comments/