AJAX Accordion Control error

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ASP.NET

I have use AJAX Accordion Control in master page. when i click any content page and insert some data it works fine for first two times but after that the data not inserted and show following error and when i run on local its work fine but the issue occurred when i upload the project in server.

var Page_ValidationActive = false;
if (typeof(ValidatorOnLoad) == "function")
{
    ValidatorOnLoad();
}
function ValidatorOnSubmit()
{
     if (Page_ValidationActive)
     {
         return ValidatorCommonOnSubmit();
     }
     else
     {
         return true;
     }
}
Sys.Application.initialize();
Sys.Application.add_init(
        function()
        {
            $create(AjaxControlToolkit.AccordionBehavior,
                   {
                       "ClientStateFieldID":"ctl00_Accordion1_AccordionExtender_ClientState",
                       "ContentCssClass":"accordionContent",
                       "FadeTransitions":true,
                       "FramesPerSecond":40,
                       "HeaderCssClass":"accordionHeader",
                       "HeaderSelectedCssClass":"accordionHeaderSelected",
                       "id":"ctl00_Accordion1_AccordionExtender",
                       "requireOpenedPane":false
                   },
                   null,
                   null,
                   $get("ctl00_Accordion1")
            );
        }
);

I have use .net 3.5 framwork with sql server 2012. Please help me!