Hello,
I have two user controls in Tuturial.aspx page. Markup for Tutorial.aspx is as follows <%@ Page Title="My Test Buddy : Tutorials" Language="C#" MasterPageFile="~/MyTestBuddy_Inner.master" AutoEventWireup="true" CodeFile="Tutorials.aspx.cs" Inherits="Tutorials" %> <%@ Register Assembly="AjaxControlToolkit" Namespace="AjaxControlToolkit" TagPrefix="cc1" %> <%@ Register Src="~/UserControls/VideoMedia.ascx" TagName="Video" TagPrefix="MTB" %> <%@ Register Src="~/UserControls/PlayMedia.ascx" TagName="PlayMedia" TagPrefix="MTB" %> <asp:Content ID="Content1" ContentPlaceHolderID="head" runat="Server"> </asp:Content> <asp:Content ID="Content2" ContentPlaceHolderID="ContentPlaceHolder1" runat="Server"> <table> <tr> <td> <asp:Panel ID="pnlPlayMedia" runat="server" style="display:none"> <asp:UpdatePanel runat= ...

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