How can I subscribe to an event across AppDomains (object.Event += handler;)

I'm having the problem described in this message board post.

I have an object that is hosted in its own AppDomain.

public class MyObject : MarshalByRefObject
{
    public event EventHandler TheEvent;
    ...
    ...
}

I'd like to add a handler to that event. The handler will run in a different AppDomain. My understanding is this is all good, events get delivered across that boundary magically, with .NET Remoting.

But, when I do this:

// instance is an instance of an object that runs in a separate AppDomain
instance.TheEvent += this.Handler ; 

...it compiles fine but fails at runtime with:

System.Runtime.Remoting.RemotingException: 
     Remoting cannot find field 'TheEvent' on type 'MyObject'.

Why?

EDIT: source code of working app that demonstrates the problem:

// EventAcrossAppDomain.cs
// ------------------------------------------------------------------
//
// demonstrate an exception that occurs when trying to use events across AppDomains.
//
// The exception is:
// System.Runtime.Remoting.RemotingException:
//       Remoting cannot find field 'TimerExpired' on type 'Cheeso.Tests.EventAcrossAppDomain.MyObject'.
//
// compile with:
//      c:\.net3.5\csc.exe /t:exe /debug:full /out:EventAcrossAppDomain.exe EventAcrossAppDomain.cs
//

using System;
using System.Threading;
using System.Reflection;

namespace Cheeso.Tests.EventAcrossAppDomain
{
    public class MyObject : MarshalByRefObject
    {
        public event EventHandler TimerExpired;
        public EventHandler TimerExpired2;

        public  MyObject() { }

        public void Go(int seconds)
        {
            _timeToSleep = seconds;
            ThreadPool.QueueUserWorkItem(Delay);
        }

        private void Delay(Object stateInfo)
        {