I'm modifying the content tree in Umbraco 4.7.1.1 so that when the user right-clicks on a particular node, I open a modal window asking the user if they are sure they want to download the content (known as a Case Study).

If the user clicks on the "Download" button, I zip up a folder and it's contents on the web server and then stream it to the user, which causes a standard open/save web browser dialog box to pop up.

This is all working well, but I would like to close the Umbraco modal window and display a speech bubble, informing the user that the file has been downloaded, but the two calls to BasePage.Current.ClientTools are doing nothing.  No error is being thrown but the modal window isn't being closed and no speech bubble appears.

            BasePage.Current.ClientTools.CloseModalWindow();
            BasePage.Current.ClientTools.ShowSpeechBubble(BasePage.speechBubbleIcon.save, "Package Created", "The case study package has been created.");

Can someone help me please?

ASPX page that opens in modal window:

<%@ Page Language="C#" MasterPageFile="../../masterpages/umbracoPage.Master" AutoEventWireup="true" CodeBehind="packageCaseStudy.aspx.cs" Inherits="chilliis.eFM.Generator.WebExtensions.plugins.packageCaseStudy" %>
<%@ Register Namespace="umbraco.uicontrols" Assembly="controls" TagPrefix="umb" %>
<%@ Register Namespace="umbraco.controls" Assembly="umbraco"  TagPrefix="UmbracoControls" %>

<asp:Content ID="Content" ContentPlaceHolderID="body" runat="server">

        <div id="typeDescription" class="createDescription">
            <img src="/umbraco/plugins/eFMGenerator/images/zipped-folder-245x245.jpg" />
            <p>Do you want to download the case study?

        </div>

        <div id="zipProgress" style="display:none;">
            <p>Please wait, your case study is being zipped up.</p>
            <umb:ProgressBar ID="ProgBar" runat="server" />
            </div>

        <div style="margin-right: 15px;" id="packageControls">
                 <asp:Button runat="server" Text="Download Package" ClientIDMode="Static" ID="DownloadBtn" />
                <em> or </em>
                <a onclick="UmbClientMgr.closeModalWindow()" style="color: Blue; margin-left: 6px;" href="#">Cancel</a>
            
        </div>
        


        <script>

            $(document).ready(function () {

                $("#DownloadBtn").click(function () {

                    $("#packageControls").fadeOut('slow', function () {
                        $(this).remove();
                        $("#zipProgress").fadeIn('slow');
                    });
                });

            });

        </script>

</asp:Content>

Code behind ASPX page that delivers the zip file:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using Ionic.Zip;
using System.IO;
using System.Text;
using umbraco.BasePages;

namespace chilliis.eFM.Generator.WebExtensions.plugins
{
    
    public partial class packageCaseStudy : System.Web.UI.Page
    {
        protected void Page_Init(object sender, EventArgs e)
        {
            
        }
        protected void Page_Load(object sender, EventArgs e)
        {
            
            DownloadBtn.Click += new EventHandler(this.DownloadBtn_Click);

        }

        protected void DownloadBtn_Click(object sender, EventArgs e)
        {
            
            var caseStudyId = 0;

            int.TryParse(umbraco.helper.Request("id"), out caseStudyId);

            var packageFileName = String.Format("CaseStudy_" + caseStudyId + ".zip");
            Response.ContentType = "application/zip";
            Response.AddHeader("Content-Disposition", "filename=" + packageFileName);

            string path = Directory.GetCurrentDirectory();

            using (var zip = new ZipFile())
            {
                // zip up standard player files
                zip.AddDirectory(HttpContext.Current.Request.PhysicalApplicationPath + @"\umbraco\plugins\eFMGenerator\Player");

                // create ims manifest file

                // Add the README.txt file to the ZIP (STEP 3)
                //zip.AddEntry("README.txt", "yo ian", Encoding.ASCII);
                zip.Save(Response.OutputStream);
            }

            BasePage.Current.ClientTools.CloseModalWindow();
            BasePage.Current.ClientTools.ShowSpeechBubble(BasePage.speechBubbleIcon.save, "Package Created", "The case study package has been created.");
            
        }
    }
}