attachment_innerHTML filter does not take effect

Hello!

I am trying to add a filter attachment_innerHTML in order to manage how the attachments are shown but doing this:
<?php
function handleAtachmentHtml($html, $id){

$html = “ASDASDASDASDASDAD”;
return $html;
}
add_filter(‘attachment_innerHTML’, array(&$this, ‘handleAtachmentHtml’));
?>

I obtain no results, nothing happens… I have been googling and searching for the forum…
I use this code in the my theme’s functions.php.
What am I doing wrong??