Runtime error in AjaxLoadingPanel

[Guna]

Hi All,

    i am getting an error "Microsoft JScript runtime error: Sys.ArgumentUndefinedException: Value cannot be undefined.
Parameter name: type"  in sharepoint development but its works fine in normal web page ..

Coding :
<telerik:RadAjaxManager ID="RadAjaxManager1" runat="server">
       <AjaxSettings>
            <telerik:AjaxSetting AjaxControlID="radGrid">
                <UpdatedControls>
                    <telerik:AjaxUpdatedControl LoadingPanelID="RadAjaxLoadingPanel1" ControlID="radGrid"/>
                    <telerik:AjaxUpdatedControl ControlID="divMsg" />
                </UpdatedControls>
            </telerik:AjaxSetting>
        </AjaxSettings>
    </telerik:RadAjaxManager>

Can anyone solve this , thanks in advance.