Hi Krypto,
Li 9 of the plugin, do you have $lightbox set to 1 ? If so, you have to add a class="lightbox" to img tag in order the link is built.
If you set $lightbox to 2, DirectResize will build the link whatever class you have.
If you set $lightbox to 0, DirectResize will not build the link.
Also, lightbox link is built only if the image you want to link is bigger than the thumbnail.
I personnaly use
slimbox with this call in head :
<script type="text/javascript" src="assets/js/mootools.js"></script>
<script type="text/javascript" src="assets/js/slimbox/js/slimbox.js"></script>
<link rel="stylesheet" href="assets/js/slimbox/css/slimbox.css" type="text/css" media="screen" />
Hope that helps
