Plugin doesn't work when using another jquery script

Hi,

I’m hoping the author of this plugin will be able to shed some light on this.

I’m using a jquery vertical scroll demo script. This script makes use of the following javacsripts.

<!-- JavaScript -->
    <script type="text/javascript">
	if (typeof(jQuery) == "undefined")
   google.load("jquery", "1.4.4");
   }
    <script type="text/javascript" src="http://mydomain.com/lib/jquery.mousewheel.min.js"></script>
	<script type="text/javascript" src="http://mydomain.com/lib/jquery.easing.1.3.js"></script>
	<script type="text/javascript" src="http://www.forexpromos.com/lib/jquery.slidingtabs.pack.js"></script>
    <script type="text/javascript">
  	$(document).ready(function() {  				  		

  		// Vertical Sliding Tabs Demo
  		$("div#tabs_vertical").slideTabs({
  			// Options
  			orientation: 'vertical',
  			slideHeight: 300, // Height of the #tabs_container <div> -minus the directional button's height (37px)
  			contentAnim: 'slideLeft',
  			contentEasing: 'easeInOutExpo',
  			tabsAnimTime: 300,
  			contentAnimTime: 600
  		});		

  	});
    </script>

When I remove the jQuery load function, it seems to work back fine. Any idea on what can be done to fix this?