What we have here is known as a “plugin conflict”. What you have to do is find the cause of the conflict. There can be no fix before the cause is found. The troubleshooting procedure is all about ruling out possible causes. So far we have ruled out the possibility of a conflict with another plugin being the cause, and we have ruled out the possibility of a conflict with the theme’s slideshow JavaScript being the cause. So we need to look elsewhere for the cause, and we need to do that methodically, one little step at a time. Troubleshooting takes time, and I can’t help you to troubleshoot your problem to a deadline.
Here’s the next thing we are going to try…
Open the ‘header.php’ file and on line 114 or thereabouts you’ll see this…
<script type="text/javascript" src="<?php echo $themePath ?>js/jquery.fancybox-1.3.1.pack.js"></script>
We are going to comment out that script tag to check if the conflict is being caused by the Fancybox JavaScript. Like this…
<!-- <script type="text/javascript" src="<?php echo $themePath ?>js/jquery.fancybox-1.3.1.pack.js"></script> -->
When you have made that modification, save the file and then upload it to the theme’s folder on your server.
Let me know if this helps or not.