In my DNN 6.2.2 Website __doPostBack() method returning Denied message. 

We have expected that it might be because of Jquery conflicts.

 1) We are loading Jquery files dynamically as shown below.

<script type="text/javascript">  
   var loadJQuery = (typeof (jQuery) == 'undefined' || jQuery().jquery < "1.7.1");   
   var callNoConflict = (typeof ($) != 'undefined' &amp;&amp; typeof (jQuery) == 'undefined')
   if (loadJQuery) {
       var filename= 'https://ajax.googleapis.com/ajax/libs/jquery/1.7.1/jquery.min.js';
       var fileref=document.createElement('script');
       fileref.setAttribute("type","text/javascript");
       fileref.setAttribute("src", filename);
       document.getElementsByTagName("head")[0].appendChild(fileref);
   }
   
   if (callNoConflict) {
       jQuery(function(){
           jQuery.noConflict();
       });
   }
</script> 

2) We have unchecked the Host Jquery option in Admin->Site Settings.

Even though the problem is not solved.

When i debug through firebug in Mozilla it showing telerik.web.ui.webresource.axd is not loading. Please help us.

Note: When i click edit module its is throwing Denied message.