Trouble with Natural TypeMocks

I'm experimenting with the new Natural TypeMocks, and I cannot get them to work. I'm new to TypeMock in general, so it's possible I'm making a novice mistake.

I create a simple example of a class that has a method called foo that creates a standard List, and Adds something to it. I then create a seperate Test project that tests this class, and then try to mock out the call to Add. The TypeMock related code of my test looks like this:

            using (RecordExpectations recorder = RecorderManager.StartRecording())
            {
                aList.Add(null);
            }

I've tried many permutations of this code and I always get the following error: The name 'aList' does not exist in the current context

How is this supposed to work?

Thanks!

-Scot

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