FancyBox Gallery not working

It works in single images but not with galleries.
In a older post with the same question the problem was that the gallery images had to point to image file, but I have selected that option and is not working.

I have another plugin that may have making conflict, NivoSlider.
At first fancybox was not working at all, but I have changed some things in the code of Nivo.
The code I have in header.php is:

<!-- NivoSlider -->
<link rel="stylesheet" type="text/css" href="<?php bloginfo('template_url');?>/scripts/nivo-slider.css" media="screen" />
<link rel="stylesheet" type="text/css" href="<?php bloginfo('template_url');?>/scripts/themes/default/default.css" media="screen" />
<script type="text/javascript" src="<?php bloginfo('template_url'); ?>/scripts/jquery.nivo.slider.pack.js"></script>

<script type="text/javascript">
 	jQuery(document).ready(function($) {
	$('#nivoslider').nivoSlider({pauseTime: 4000,pauseOnHover: true});
	});
</script>

I dont now if there is a problem with that.

Please help.

http://ww.wp.xz.cn/extend/plugins/fancybox-for-wordpress/