SCRIPT5022: Sys.WebForms.PageRequestManagerServerErrorException: Input string was not in a correct format.

Hi All,

I am stuck at this problem, I am not getting any post-back requests on IE-9 but I am getting it on IE-10 and IE-11.  For my surprise I am getting the the post back requests on IE-8 as well. 

I am only getting the following error:

"SCRIPT5022: Sys.WebForms.PageRequestManagerServerErrorException: Input string was not in a correct format."

I have already tried the followings:

1. Browser compatibility

<meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1" />

2. EnablePartialRendering property

<ajaxToolkit:ToolkitScriptManager runat="Server" ID="ScriptManager1" AsyncPostBackTimeout="18000"
                                              EnablePageMethods="true" EnablePartialRendering="False"><CompositeScript><Scripts><asp:ScriptReference Name="MicrosoftAjax.js" /><asp:ScriptReference Name="MicrosoftAjaxWebForms.js" /></Scripts></CompositeScript></ajaxToolkit:ToolkitScriptManager>

protected void Page_Init(object sender, EventArgs e)
        {
            // Do any related intialization work.
            ScriptManager1.EnablePartialRendering = false;
        }

Now I am getting out of options here. 

Any ideas?

Thanks,

Attiqe

Attiqe Ur Rehman