ajax calendar control Error Sys.ArgumentOutOfRangeException: Sys.ArgumentOutOfRangeException: Value must be an integer. Parameter name: y or Parameter name: x

/////////////////////

change Toolkit Script Manager from

<asp:ToolkitScriptManager ID="ToolkitScriptManager1" runat="server"

            </asp:ToolkitScriptManager>

change Toolkit Script Manager To

<asp:ToolkitScriptManager ID="ToolkitScriptManager1" runat="server" LoadScriptsBeforeUI="false" ScriptMode="Release"

                EnablePartialRendering="true">

            </asp:ToolkitScriptManager>