Contact Form 7 and Tabber problem

Hello,

I am using Contact Form 7 plugin v.2.2.1 with Bizmax theme, so I have a tabber at the right side. The problem is that when the plugin is desactivated, my blog is ok, but when I have the plugin activated, I have mixed the three sections of my tabber.

Could you help me or give me a tip how can I found the problem please?
I guess that maybe there are two classes with the same name, but I coudn’t fint it yet. Here is the source of my tab.php:

<div class="clear"></div>
<div id="tabzine" class="widgets">
    <ul class="tabnav">
        <li class="pop"><a href="#video"> ENLACES </a></li>
        <li class="fea"><a href="#tags"> NUBE TAGS </a></li>
		<li class="rec"><a href=" #popular"> POPULAR  </a></li>
    </ul>

<div id="video" class="tabdiv">

     	<?php $vid = get_option('biz_video'); echo stripslashes($vid); ?>

</div>

<div id="tags" class="tabdiv">

<?php if ( function_exists('wp_tag_cloud') ) : ?>
					<?php wp_tag_cloud('smallest=10&largest=18&format=flat'); ?>
<?php endif; ?>

</div>

 <div id="popular" class="tabdiv">
    <ul>

	<?php if(function_exists('akpc_most_popular')) { akpc_most_popular(); } ?>

    </ul>
</div>

</div>

Thanks in advance!!!