We are transitioning our website to Umbraco, so right now we are playing around with using .Net user controls to add some business specific functionality. Right now I have a very basic user control:

TestControl.ascx

<%@ Control Language="C#" AutoEventWireup="true" CodeBehind="TestControl.ascx.cs" Inherits="UmbracoUserControls.TestControl" %>
<asp:Panel ID="Questions" runat="server">
    
    <asp:Button ID="btn_Calculate" Text="Recommendations" runat="server" onclick="btn_Calculate_Click" ></asp:Button>
    
</asp:Panel>
<asp:Panel ID="Answer" runat="server">
    Your recommendation is: <asp:Label ID="lbl_Message" runat="server"></asp:Label>
</asp:Panel>

TestControl.ascx.cs

namespace UmbracoUserControls
{
    public partial class TestControl : System.Web.UI.UserControl
    {
        protected void Page_Load(object sender, EventArgs e)
        {
            lbl_Message.Text = "Message";
        }
        protected void btn_Calculate_Click(object sender, EventArgs e)
        {
            lbl_Message.Text = "Message";
        }
    }
}

I've uploaded the .ascx to the usercontrol directory, UmbracoUserControls.dll to the bin directory, created the macro that points to the usercontrol. I used the macro button to add the Macro into a RichTextEditor on one of our pages. The content from the user control displays properly, but neither the Page_Load or the btn_Calculate_Click events fire. I've noticed one other thread on the forum describing similar issues, but it stopped before a resolution was posted. http://our.umbraco.org/forum/core/general/5341-Net-user-control-button-click-events-not-working

Any guidance would be greatly appreciated as I'm kinda scratching my head right now.