Did you use Social Media toolkit to create this share button, your code looks drastically different from mine.
in my example, it uses an onclick event:
<div class="icons">
<a name="fb_share" type="icon" href="#" onclick="window.open('http://www.facebook.com/sharer.php?u=<?php echo urlencode('http://localhost/uploadprobs/facebooktest.php'); ?>', 'Facebook', 'toolbar=0,status=0,width=626,height=436'); return false;" title="Facebook">
<img src="webassist/social/icons/facebook.png" />
</a>
</div>
and it does not include the script tag to connect to the facebook site.