Ad rotation Issue

Using: ASP.net 4.0/ C#/ SQL 2008 db

I have an ad rotator control on my website. I made the xml file and everything is working except my jquery. I use the jquery to refresh and change the add every 10 seconds. It works perfect when I load the page for the first time. After I click the log in or registrer page though, it doesn't refresh every 10 seconds. It just does a refresh when I go to another page. Any idea what could cause it not to refresh once a new page is navigated to?

Master Page file:<script type="text/javascript" src="Scripts/jquery-1.7.1.min.js"></script><script type="text/javascript">
     $(document).ready(function () {
         setInterval(function () {
             $("#arAdvertisement").load(location.href + " #arAdvertisement", "" + Math.random() + "");
         }, 10000);
     });</script><footer><div class="content-wrapper"><div class="float-left"><p>&copy; <%: DateTime.Now.Year %> - website.com</p></div></div><div class="content-wrapper"><br /><br /><br /><div class="float-center"><asp:AdRotator ID="arAdvertisement"  AdvertisementFile="~/Ad.xml"  Target="_blank"  runat="server"  Width="600px" Height="131px" /></div></div></footer>