mocking firing of an event

Hi. I am trying to mock the firing of an event in 3.7.1 (enterprise license) and am getting the following error:

Test method UnitTest.ClassDerivedTest.TestOnResetEventIsCalled threw exception: TypeMock.TypeMockException:
*** No handlers are registered to the event.


This is happening in the case where my event is in the base class. I have created a small example.

using System;

namespace EventBug
{
public class ClassBase
{
public delegate void ResetHandler();
public event ResetHandler OnReset;
}

public class ClassDerived : ClassBase
{
public ClassDerived()
{
OnReset += new ResetHandler(MyOnReset);
}

public void MyOnReset()
{
Console.WriteLine("Handler is called");
}
}
}

My test is

// The following code was generated by Microsoft Visual Studio 2005.
// The test owner should check each test for validity.
using Microsoft.VisualStudio.TestTools.UnitTesting;
using System;
using System.Text;
using System.Collections.Generic;
using EventBug;
using TypeMock;

namespace UnitTest
{
/// <summary>
///This is a test class for EventBugTypeMock.ClassDerived and is intended
///to contain all EventBugTypeMock.ClassDerived Unit Tests
///</summary>
[TestClass()]
public class ClassDerivedTest
{
[TestMethod()]
public void TestOnResetEventIsCalled()
{
Mock mockEvent = MockManager.MockAll(typeof(ClassBase)); // I have also tried ClassDerived here.
MockedEvent onReset = mockEvent.ExpectAddEvent("OnReset");
ClassDerived dc = new ClassDerived();
onReset.Fire();
MockManager.Verify();
}

}
}

I am not sure what is wrong. I have a test working where the event is not part of a base class.

Thanks for your help.
Sam