Asp – Problem getting MVC AJAX partial load to work

I was following the example laid out here for implementing AJAX panels in MVC. I'm using VB.NET, but the conversion is pretty straightforward. However, I can't seem to get it to work, and I'm running out of ideas as to why. Here is my code:

HomeController:

Function Index() As ActionResult
    Return View()
End Function

Function Archive() As ActionResult
    Threading.Thread.Sleep(5000)
    Return View()
End Function

Archive.ascx (partial view):

<%@ Control Language="VB" Inherits="System.Web.Mvc.ViewUserControl" %>
Hello World

Index.aspx (view):

<%@ Page Language="VB" MasterPageFile="~/Views/Shared/Site.Master" Inherits="System.Web.Mvc.ViewPage" %>

<asp:Content ID="indexContent" ContentPlaceHolderID="body" runat="server">
    <% Using Ajax.BeginForm("Archive", "Home", Nothing, New AjaxOptions With {.UpdateTargetId = "resultDiv"}, New With {.id = "reportFormOne"})%>
    <% End Using%>
    <div id="resultDiv">
        <img src="../../Content/images/ajax-loader.gif" alt="" />
    </div>

    <script type="text/javascript" src='<%= Url.Content("~/Scripts/jquery-1.3.2.min.js") %>'></script>

    <script type="text/javascript">

        $get("reportFormOne").onsubmit();

    </script>

</asp:Content>

When I run it, all I see is the ajax-loader animation endlessly. When I run it in debug mode, it never seems to trigger the Archive action. Can anyone see what I'm missing?

UPDATE: Thanks to @Joseph for pointing out that jQuery wasn't loaded. Now it is, but I'm getting "Object expected" on the $get call.

UPDATE 2: Here's what Index.aspx looks like now with the "document ready" code. It's giving me a "Object doesn't support this property or method" error with this configuration.

<script type="text/javascript" src='<%= Url.Content("~/Scripts/jquery-1.3.2.min.js") %>'></script>
<script type="text/javascript" src='<%= Url.Content("~/Scripts/MicrosoftAjax.js") %>'></script>
<script type="text/javascript" src='<%= Url.Content("~/Scripts/MicrosoftMvcAjax.js") %>'></script>

<script type="text/javascript">

    $(document).ready(function() {
        $("#reportFormOne").submit();
    });

</script>

<% Using Ajax.BeginForm("Archive", "Home", Nothing, New AjaxOptions With {.UpdateTargetId = "resultDiv"}, New With {.id = "reportFormOne"})%>
<% End Using%>
<div id="resultDiv">
    <img src="../../Content/images/ajax-loader.gif" alt="" />
</div>

UPDATE 3: Realized it was choking on "onsubmit". Changed it to "submit" and it functioned. However, after changing the delay to 5 seconds, the animated gif did not spin – it just stayed static for 5 seconds, then the whole page was replaced by "Hello World" instead of just replacing the animated gif in the div. AAARRRGGGHHH!

UPDATE 4: Added missing AJAX libraries to the code in Update 2. This still doesn't work correctly, but if I don't use the jQuery submit and instead add a Submit button to the form, it works correctly. Why?