when running this test the updateModel didn't return a result result is null

[TestMethod]
public void EditAction_Should_Redirect_When_Update_Successful( ) {

// Arrange
var controller = CreateDinnersControllerAs("SomeUser");
int id = 1;

FormCollection formValues = new FormCollection() {
{ "Title", "Another value" },
{ "Description", "Another description" }
};

controller.ValueProvider = formValues.ToValueProvider();

// Act
var result = controller.Edit(id, formValues) as RedirectToRouteResult;

// Assert
Assert.AreEqual("Details", result.RouteValues["Action"]);
Assert.AreEqual(id, result.RouteValues["id"]);
}

The updateModel problem was solved by un-installed MVC 2,
and install MVC 2 RC 2, this updated the Forms Collection get method.