Question regarding writing a Visual Studio.NET add-in....

[JDeats]

I'm trying to create a Visual Studio.NET Add-in. I'm using the wizard
provided by VS.NET. I have Visual Studio.NET Enterprise Architect
edition and I've selected New->Projects->Other Projects->Extensibility
Projects->Visual Studio.NET Add-in.

After walking through the wizard it appears I have an add-in skeleton.
In the OnConnection event handler I have:

---
Command command = commands.AddNamedCommand(addInInstance, "MyAddin1",
"MyAddin1", "MyAddin1 description", true, 59, ref contextGUIDS,
(int)vsCommandStatus.vsCommandStatusSupported+(int )vsCommandStatus.vsCommandStatusEnabled);
CommandBar commandBar = (CommandBar)commandBars["Tools"];
CommandBarControl commandBarControl =
command.AddControl(commandBar, 1);
---

Following this code I added a dialog popup to indicate that the add-in
is loaded:

---
System.Windows.Forms.MessageBox.Show("Add-in MyAddin1 successfully
loaded");
---

I've done a debug build and I ran the installer that was generated by
the wizard. So I assume the add-in is installed and this is confirmed
when I open a new instance of VS.NET I can browse to Tools->Add-in
Manager and I see MyAddin1 listed, but when I check the box for
"Startup" and click "Ok" nothing happens. My message box never shows
up and I don't see an item for "MyAddin1" in the tools menu.

Where to next?