How do I get F12 to break into the debugger on Vista x64 with VS 2008?

using System;
using System.Diagnostics;
using System.Drawing;
using System.Runtime.InteropServices;
using System.Threading;
using System.Windows.Forms;

namespace KeyboardHook
{

	public sealed class SimpleKeyboardHook : IDisposable
	{
		public SimpleKeyboardHook(Action<Keys> handler)
		{
			if (null == handler) { throw new ArgumentNullException("handler"); }
			this._handler = handler;
			var t = new Thread(this.ListenerThread) { IsBackground = true, Name = "KeyboardListener" };
			t.Start();
		}

		public void Dispose()
		{
			if (!this._disposed)
			{
				UnhookWindowsHookEx(this._id);
				this._disposed = true;
				GC.SuppressFinalize(this);
			}
		}

		public static void BreakOnF12(Keys keys)
		{
			if (keys == Keys.F12)
			{
				Debugger.Break();
			}
		}

		private void ListenerThread()
		{
			using (var currentProcess = Process.GetCurrentProcess())
			using (var mainModule = currentProcess.MainModule)
			{
				if (null == mainModule) { throw new InvalidOperationException("Unable to determine main module for the current process"); }

				this._id = SetWindowsHookEx(
					WH_KEYBOARD_LL,
					this.HookCallback,
					GetModuleHandle(mainModule.ModuleName), 0);
			}

			Application.Run();
		}

		private IntPtr HookCallback(int nCode, IntPtr wParam, IntPtr lParam)
		{
			if (nCode >= 0 && wParam == (IntPtr)WM_KEYDOWN)
			{
				var vkCode = Marshal.ReadInt32(lParam);
				this._handler((Keys)vkCode);
			}
			return CallNextHookEx(this._id, nCode, wParam, lParam);
		}

		private delegate IntPtr LowLevelKeyboardProc(int nCode, IntPtr wParam, IntPtr lParam);

		[DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = true)]
		private static extern IntPtr SetWindowsHookEx(int idHook,
			LowLevelKeyboardProc lpfn, IntPtr hMod, uint dwThreadId);

		[DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = true)]
		[return: MarshalAs(UnmanagedType.Bool)]
		private static extern bool UnhookWindowsHookEx(IntPtr hhk);

		[DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = true)]
		private static extern IntPtr CallNextHookEx(IntPtr hhk, int nCode,
			IntPtr wParam, IntPtr lParam);

		[DllImport("kernel32.dll", CharSet = CharSet.Auto, SetLastError = true)]
		private static extern IntPtr GetModuleHandle(string lpModuleName);

		private const int WH_KEYBOARD_LL = 13;
		private const int WM_KEYDOWN = 0x0100;
		private IntPtr _id;
		private readonly Action<Keys> _handler;
		private volatile bool _disposed;
	}


	static class Program
	{
		private static void GoToSleep(object sender, EventArgs args)
		{
			Thread.Sleep(10000);
		}

		[STAThread]
		static void Main()
		{
			using (new SimpleKeyboardHook(SimpleKeyboardHook.BreakOnF12))
			{
				Application.EnableVisualStyles();
				Application.SetCompatibleTextRenderingDefault(false);

				var form = new Form { Text = "Sleepy form", Size = new Size(160,80), Padding = new Padding(6) };
				var btn = new Button { Dock = DockStyle.Fill, Text = "Sleep", Location = new Point(10, 10) };
				btn.Click += GoToSleep;
				form.Controls.Add(btn);
				Application.Run(form);
			}
		}
	}
}