Tabs Widget: I can't reload ajax tab content on IE

Tabs Widget: I can't reload ajax tab content on IE

The webpage (.aspx) shown below should refresh the contents of the second tab every time it is accessed, reloading anothercontent. aspx page on that tab . This works well in all browsers except IE (9 & 10 tested). Why?
Thanks!
  1. <html xmlns="http://www.w3.org/1999/xhtml">
  2. <head runat="server">
  3.     <title></title>
  4.     <script src="jscripts/jquery/jquery-1.9.0.js" type="text/javascript"></script>
  5.     <script src="jscripts/jquery/jquery-ui-1.10.0.custom.min.js" type="text/javascript"></script>
  6.     <link href="jscripts/jquery/css/redmond/jquery-ui-1.10.0.custom.min.css" rel="stylesheet" type="text/css" />

  7.     <script type="text/javascript">
  8.         $(function () {
  9.             $("#tabs").tabs({
  10.                 beforeLoad: function (event, ui) {
  11.                     ui.jqXHR.error(function () {
  12.                         ui.panel.html("error");
  13.                     });
  14.                 }
  15.             });
  16.         });
  17.   </script>
  18. </head>
  19. <body>
  20.     <form id="form1" runat="server">
  21.         <div>
  22.            <div id="tabs">
  23.                 <ul>
  24.                     <li><a href="#tabs-1">First</a></li>
  25.                     <li><a href="anothercontent.aspx">Second</a></li>
  26.                 </ul>
  27.                 <div id="tabs-1">
  28.                     <p>some text</p>
  29.                 </div>
  30.             </div>       
  31.         </div>
  32.     </form>
  33. </body>
  34. </html>