Save Button in asp.net accordance

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ASP.NET

hello friends,
I have used Accordance in my web page.
Accordance consist of

1. text box<br />
2. save button

When i try to click the save button, the code written for save does not get called.

Here is my code
1. aspx code

<cc1:Accordion ID="Accordion1"  runat="server" HeaderCssClass="accordionHeader" HeaderSelectedCssClass="accordionHeaderSelected"
                           ContentCssClass="accordionContent" SelectedIndex="-1" FadeTransitions="true" SuppressHeaderPostbacks="true"
                           TransitionDuration="250" FramesPerSecond="40" RequireOpenedPane="false" AutoSize="None" style="text-align:center;" >
                               <Panes>
                                   <cc1:AccordionPane ID="AccPan1"   runat="server"  önclick="setFocus();">
                                       <Header>
                                            <table width="100%" border="0" cellspacing="2" cellpadding="2">
                                           <tr>
                                               <td style="color:#3B8DBD;text-align:left;">
                                                   Comments:
                                               </td>
                                           </tr>
                                       </table>
                                       </Header>
                                       <Content>
                                           <asp:TextBox TextMode="MultiLine" runat="server" Width="80%" Height="100px" ID="txtComments"
                                           onkeypress="appendText(event);" Text="* ">
                                           </asp:TextBox>
                                           <input type="hidden" value="0" id="hdn1" />
                                           <div style="text-align:right">
                                               <asp:Button runat="server" Id="btnSaveComments" Text="Save" style="margin:5px 110px 0px 0px;"/>
                                           </div>
                                       </Content>
                                   </cc1:AccordionPane>
                               </Panes>
                           </cc1:Accordion>

2.code behind code

protected void btnSaveComments_Click(object sender, EventArgs e)
   {
       string[] comments = txtComments.Text.Split('*');
       txtComments.Text = "";
   }

Can anyone tell, why there is no call to code??
Where I'm going wrong??

Thanks in advance =)