Newbie: Cannot use Return in this sequence

I recently purchased TypeMock and the TypeMock examples seem to run fine. However, since yesterday, I have been unable to get even the simplest TypeMock test to run (although, inexplicably, the TypeMock examples continue to run just fine).

I am mocking my own simple class, not framework ones. I get the same error running the test from VS2005 and TMockRunner. To be honest, I feel like I am going mad, very quickly. I assume that I must be making a rookie mistake, I just can't see where.

XP Pro SP2, Dual CPU, Dual monitor, 3Gb RAM. VS 2005 Pro SP1, R# 2.5.1.

So, from scratch:

• I create a new C# class library project using VS2005 Pro SP1 (with R# 2.5.1)

• I add references to nunit (2.2.8) and TypeMock (3.6.1 Enterprise)

• I add two classes, the tester and the testee. Both very simple and reproduced below

• I run the tests from VS2005 (TypeMock.NET is enabled) using either TestRunner or R# Test tool OR I run the test using TMockRunner.exe, as shown below

• I get an error

I have tried rebooting, unitstalling and reinstalling TypeMock. All to no avail.

TMockRunner output with Error

C:DevTypeMockBrandNewTestTypeMockBrandNewTestinDebug>"c:Program FilesTypeMockTypeMock.NETTMockRunner.exe" "c:Program FilesNUnit-Net-2.0 2.2.8in
unit-console.exe" TypeMockBrandNewTest.dll
NUnit version 2.2.8
Copyright (C) 2002-2003 James W. Newkirk, Michael C. Two, Alexei A. Vorontsov, Charlie Poole.
Copyright (C) 2000-2003 Philip Craig.
All Rights Reserved.

OS Version: Microsoft Windows NT 5.1.2600 Service Pack 2    .NET Version: 2.0.50727.42

.F
Tests run: 1, Failures: 1, Not run: 0, Time: 0.313 seconds

Failures:
1) TypeMockBrandNewTest.Class1.RunMe : TypeMock.TypeMockException :
*** Cannot use Return in this sequence, there must be a mocked statement first
   at TypeMock.RecordExpectations.b(String A_0)
   at TypeMock.RecordExpectations.a(String A_0)
   at TypeMock.RecordExpectations.Return(Object returnValue)
   at TypeMockBrandNewTest.Class1.RunMe() in c:DevTypeMockBrandNewTestTypeMockBrandNewTestClass1.cs:line 15

Tester class

using NUnit.Framework;
using TypeMock;

namespace TypeMockBrandNewTest
{
   [TestFixture] public class Class1
   {
      
      [Test] public void RunMe()
      {
         using (RecordExpectations recorder = new RecordExpectations())
         {
            Boo boo = new Boo();
            boo.GetValue("foo");
            recorder.Return(22); // NOTE: THIS IS LINE 15 INDICATED IN THE ERROR OUTPUT
         }

         Boo b = new Boo();
         Assert.AreEqual(22, b.GetValue("foo"));
      }
   }
}

Testee class

namespace TypeMockBrandNewTest
{
   public class Boo
   {
      public int GetValue(string arg)
      {
         if (arg == "boo") return 1;
         return 2;
      }
   }
}

I have the output from running after set TMOCK_VERBOSE=1 but I am not sure that I can attach those files to this post.

!!!!P L E A S E H E L P!!!![/i]