[Rhino] Mock Anomalies: Setup Stub Once Call Multiple Times - Must Call .Stub<T> and SetupResult

I was hooking up multiple times because otherwise it was giving me grief.  Here's the test that seems to work the way I intended (for setting up a stub method once and call it multiple times.

[TestMethod]

public void TestSetupStubOnceCallMultipleTimes()

{

    //IDemo partialStub = MockRepository.GenerateStub<IDemo>();

    IDemo partialStub = new MockRepository().Stub<IDemo>();

    //This line does not work unless I have called the above .Stub<IDemo>

    partialStub

        .Stub<IDemo, string>((x) => { return x.ReturnStringWithInt32Arg(30); })

        .IgnoreArguments()

        .Do(

            (Func<int, string>)((arg) =>

            {

                return string.Format(

                    "{0}{1}",

                    new string('0', 6 - arg.ToString().Length), arg);

            })

        );

    //If I comment the above line out, it gives me this error on SetupResult below

    //Test method ThinkFarAhead.LearningMocking.Expectations.SetupResult2.TestRhinoAndMoq.Working threw exception:

    //System.InvalidOperationException: Invalid call, the last call has been used or 

    //no call has been made (make sure that you are calling a virtual (C#) / Overridable (VB) method)..

    //This error occurs both when I create the Stub using 

    //MockRepository.GenerateStub<IDemo>() or new MockRepository().Stub<IDemo>()

    SetupResult.For((Action<IDemo>)(x => x.ReturnStringWithInt32Arg(30))).IgnoreArguments()

      .Do((Func<int, string>)((arg) =>

      {

          return string.Format(

              "{0}{1}",

              new string('0', 6 - arg.ToString().Length), arg);

      }

        ));

    partialStub.Replay();

    Assert.AreEqual("000020", partialStub.ReturnStringWithInt32Arg(20));

    Assert.AreEqual("000030", partialStub.ReturnStringWithInt32Arg(30));

    Assert.AreEqual("000040", partialStub.ReturnStringWithInt32Arg(40));

}