Mocking private methods with ref/out parameter

Hi,

Is mocking private methods with ref/out parameters an "enterprise-only" feature? The following snippet results in a "TypeMockException: This feature is an enterprise feature, to enable please enter license key.."

// ... code omitted

TestedClass_Accessor accessor = new TestedClass_Accessor(new PrivateObject(testObject));
DateTime testValue = DateTime.Now;

using (RecordExpectations recorder = RecorderManager.StartRecording())
{
    accessor.PrivateMethod(ref testValue);
    recorder.CheckArguments();
    recorder.Return(false);
}

// ... code omitted

Before upgrading to TypeMock 4.1 mocking ref/out parameters worked just fine. I also tried to reinstall TypeMock 4.1 but that didn't help.

Thanks in advance,
/Enrico