ModalPopupExtender in Usercontrol

Hi I have a ModalPopup within a usercontrol. I can show the modalpopup from my page but the buttons in the Modal doent seem to fire their on click events. Here is my code:

Usercontrol:

<%@ Control Language="vb" AutoEventWireup="false" CodeBehind="email_popup.ascx.vb" Inherits="email_popup" %><%@ Register Assembly="AjaxControlToolkit" Namespace="AjaxControlToolkit" TagPrefix="cc1" %><!-- auto email modal --><asp:UpdatePanel ID="UpdatePanel1" runat="server"><ContentTemplate><asp:Panel runat="server" ID="autoEmail">

'some textboxes here<div class="button-strip"><br /><asp:Button ID="btnSend" runat="server" Text="Send" CssClass="button" /><br /></div><div class="button-strip"><br /><asp:LinkButton ID="LinkButton1" runat="server">LinkButton</asp:LinkButton><br /></div><div class="form-view"><label><asp:Label ID="lblEmailError" runat="server" CssClass="errorText"></asp:Label></label></div></div></div></asp:Panel><cc1:ModalPopupExtender ID="modalSendEmail" runat="server" PopupControlID="autoEmail" TargetControlID="autoEmail" BackgroundCssClass="modalBackground" PopupDragHandleControlID="autoEmail" OkControlID="btnSend" CancelControlID="Linkbutton1"></cc1:ModalPopupExtender></ContentTemplate><Triggers><asp:AsyncPostBackTrigger ControlID="btnSend" EventName="Click" /><asp:AsyncPostBackTrigger ControlID="LinkButton1" EventName="Click" /></Triggers></asp:UpdatePanel>

User control code behind:

  Protected Sub btnSend_Click1(sender As Object, e As EventArgs) Handles btnSend.Click
       ' Any code in here does not run
    End Sub

 I've been working on this for a few days now so any help will be gratefully receive.

Thanks

Leonaisse