title: ASP.net Ajax tab container not appearing
body: <p>I created new web project using VS 2008 with enabled Ajax template with C# and Framework 3.5.</p>
  
  <p>I added Ajax reference to the project and I can see all Ajax toolkit in my tool box.</p>
  
  <p>The problem that when I add tab container with Tab Panels then run the projects nothing appear on the browser and I tried few browsers.</p>
  
  <p>I'm including my code and I wish that someone would help me.</p>
  
  <p>Regards,</p>
  
  <p>My Code:
  ................................................................</p>
  
  <pre><code>&lt;%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="Contacts._Default" %&gt;
  
  &lt;%@ Register assembly="AjaxControlToolkit" namespace="AjaxControlToolkit" tagprefix="asp" %&gt;
  
  &lt;!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"&gt;
  
  &lt;html xmlns="http://www.w3.org/1999/xhtml" &gt;
      &lt;head runat="server"&gt;
          &lt;title&gt;Untitled Page&lt;/title&gt;
      &lt;/head&gt;
      &lt;body&gt;
          &lt;form id="form1" runat="server"&gt;
              &lt;asp:ScriptManager ID="ScriptManager1" runat="server" /&gt;
              &lt;div&gt;
  
                  &lt;asp:TabContainer ID="TabContainer1" runat="server" ActiveTabIndex="0"&gt;
  
                      &lt;asp:TabPanel runat="server" HeaderText="TabPanel1" ID="TabPanel1"&gt;
                          &lt;ContentTemplate&gt;
                            tab 1
                          &lt;/ContentTemplate&gt;
                      &lt;/asp:TabPanel&gt;
  
                      &lt;asp:TabPanel runat="server" HeaderText="TabPanel2" ID="TabPanel2"&gt;
                          &lt;ContentTemplate&gt;
                            tab 2
                          &lt;/ContentTemplate&gt;
                      &lt;/asp:TabPanel&gt;
  
                      &lt;asp:TabPanel runat="server" HeaderText="TabPanel3" ID="TabPanel3"&gt;
                          &lt;ContentTemplate&gt;
                            tab 3
                          &lt;/ContentTemplate&gt;
                      &lt;/asp:TabPanel&gt;
  
                  &lt;/asp:TabContainer&gt;
  
              &lt;/div&gt;
  
          &lt;/form&gt;
      &lt;/body&gt;
  &lt;/html&gt;
  </code></pre>