ASP.Net Container Control Designer

I cannot figure out how to get my simple container control to properly display in the designer. Here is the basic markup of the custom control:
<div>
<div>Title</div>
<div>
<!-- ASP.Net child controls -->
</div>
</div>
Here is how it looks at runtime (title and then the child control is a GridView):
Here is the simple code for the basic container control:

namespace Shoe.Controls
//[Designer(typeof(ApplicationWindowDesigner))]
//[ParseChildren(false)]
//[PersistChildren(true)]
[ToolboxData("<{0}:ApplicationWindow runat="server"></{0}:ApplicationWindow>")]
public class ApplicationWindow : System.Web.UI.WebControls.Panel
{
#region Designer Properties
[Category("Appearance")]
[DefaultValue("Application")]
[Description("Title that will appear at the top of the Window.")]
[Browsable(true)]
public string Title
get{return (ViewState["ApplicationWindowTitle"] == null)?
string.Empty :
(string)ViewState["ApplicationWindowTitle"];}
set{ViewState["ApplicationWindowTitle"] = value;}
[code...]
As you see the code above, it is currently based off of the Panel control. However, I have also tried just using WebControl as the base class and then providing my own designer as follows:

namespace Shoe.Controls
public class ApplicationWindowDesigner : ContainerControlDesigner
//public class ApplicationWindowDesigner : ControlDesigner
public override void Initialize(IComponent component)
base.Initialize(component);
SetViewFlags(ViewFlags.DesignTimeHtmlRequiresLoadComplete, true);
[code...]

This is also what it looks like when I use WebControl as the base class for the control and use a designer based off of ContainerControlDesigner (child controld, but my title bar and divs are missing).What am I missing? I've found several examples of ContainerControlDesigner but none of them really add anything to the surrounding control like I am.