wp_footer() doesn´t include any wp-slimstat js code

I´ve just installed version 2.4 of plugin and files are copied and the database is created. Dashboard menu entry is visible and plugins are active but no data is recorded

The function wp_footer() is invoked at the end of footer.php, and other plugins are adding code but there is any reference to your plugin

*** Page HTML ***

...
<script type='text/javascript' src='http://www.musicasnblog.com/wp-includes/js/admin-bar.js?ver=20110131'></script>
<div id="wpadminbar">...</div>
</body>

***

Any idea? Thanks