tabcontainer causes my page not to be refreshed

The TabContainer in the following code does NOT refresh my page. Can anybody tell me what's wrong, please?

[My web page works just fine when the TabContainer is removed from the code]

<%

@dotnet.itags.org.PageLanguage="VB"AutoEventWireup="true" %>

<%

@dotnet.itags.org.ImportNamespace="System.Data" %>

<%

@dotnet.itags.org.ImportNamespace="System.Data.SqlClient" %>

<%

@dotnet.itags.org.RegisterAssembly="AjaxControlToolkit, Version=1.0.10123.0, Culture=neutral, PublicKeyToken=28f01b0e84b6d53e"Namespace="AjaxControlToolkit"TagPrefix="cc1" %>

<!

DOCTYPEhtmlPUBLIC"-//W3C//DTD XHTML 1.1//EN""http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">

<

scriptrunat="server">

Protected Sub Button1_Click(ByVal sender As Object, ByVal e As System.EventArgs)

TextBox2.text = TextBox1.Text

End Sub

</

script>

<

htmlxmlns="http://www.w3.org/1999/xhtml">

<

headrunat="server"><title>Untitled Page</title>

</

head>

<

body><formid="form1"runat="server"><asp:ScriptManagerID="ScriptManager1"runat="server"/><div> </div><asp:UpdatePanelID="UpdatePanel1"runat="server"><ContentTemplate><cc1:TabContainerOnUnload="Button1_Click"ID="ManageVendorsTabContainer"runat="server"Style="position: absolute;

left: 249px; top: 110px;">

<cc1:TabPanelID="TabPanelCreateVendorID"runat="server"><HeaderTemplate>

Create Vendor

</HeaderTemplate><ContentTemplate> <asp:TextBoxID="TextBox1"runat="server"></asp:TextBox><asp:TextBoxID="TextBox2"runat="server"></asp:TextBox><asp:ButtonID="Button1"OnClick="Button1_Click"runat="server"Text="Button"/></ContentTemplate></cc1:TabPanel></cc1:TabContainer></ContentTemplate></asp:UpdatePanel></form>

</

body>

</

html>

Hi,

I tried you code, it works as expected.

Or can you be specific about the issue with you.