Hi I am not able to solve this error The Controls collection cannot be modified because the control contains code blocks (i.e. <% ... %>).
this is my script
<body>
<form id="form1" runat="server">
<asp:ScriptManager ID="ScriptManager2" runat="server" />
<telerik:RadAjaxLoadingPanel ID="RadAjaxLoadingPanel1" runat="server">
</telerik:RadAjaxLoadingPanel>
<telerik:RadAjaxManager EnableAJAX="true" ID="RadAjaxManager1" runat="server" DefaultLoadingPanelID="RadAjaxLoadingPanel1">
<AjaxSettings>
<telerik:AjaxSetting AjaxControlID="FormView1">
<UpdatedControls>
<telerik:AjaxUpdatedControl ControlID="FormView1" />
</UpdatedControls>
</telerik:AjaxSetting>
</AjaxSettings>
</telerik:RadAjaxManager>
<telerik:RadScriptBlock ID="RadScriptBlock1" runat="server">
<script type="text/javascript">
var FormName = "frmPerformMaintRecurringAS";
var FormId = 71;
var UserId = '<%= Session["UserId"] %>';
EntityID = FormId;
var tabstrip;
</script>
</telerik:RadScriptBlock>
what am doing wrong?