Adding/using accordian in VS2010

Creating according requires following steps to be followed
a) downlaod ajax control kit dll .
b)add ajax control kit in toolbox

now add script manager

<asp:ScriptManager ID="ScriptManager1" runat="server">

    </asp:ScriptManager>

 add accordian control

<asp:UpdatePanel ID="UpdatePanel1" runat="server">

    </asp:UpdatePanel>

<asp:Accordion ID="Accordion1" runat="server" RequireOpenedPane="false" HeaderSelectedCssClass="accordionHeaderSelected" SelectedIndex="0" AutoSize="None" FadeTransitions="true" TransitionDuration="300" FramesPerSecond="25" Height="500px">

<Panes>

<asp:AccordionPane ID="Pane1" runat ="server" HeaderCssClass="accordionHeader" >

<Header >

<b>This is a header</b>

</Header>

<Content>

This is content1. just  created for ajax testing

</Content>

</asp:AccordionPane>

<asp:AccordionPane ID="pane2" runat="server" HeaderCssClass="accordionHeader" >

<Header>

<b>This is a header2</b>

</Header>

<Content>

This is Content2.

</Content>

</asp:AccordionPane>

</Panes>

</asp:Accordion>

run the solution

screenshot shown below