Performancing Metrics

I’ve implemented Performancing Metrics on this blog. I used the following code:

        {capture name=cats}{the_category_rss}{/capture}
        <script type="text/javascript">
            z_post_title="{single_post_title}{single_cat_title}{single_month_title}";
            z_post_category="{$smarty.capture.cats|strip_tags|strip}";
        </script>
        <script id="stats_script" type="text/javascript" src="http://metrics.performancing.com/wp.js"></script>

Instead of the code given by the system.