BizTalk Server 2006 extensions for Windows Workflow Foundation SDK issue

If you are trying to get the Simple Request-Response example going and you are receiving a NullReferenceException error. Your workflow maybe terminating unexpectedly. An issue that I have with BizTalk Server 2006 extensions for Windows Workflow Foundation SDK is when the WorkflowRuntime is setup the WorkflowTerminated event implements a debug writeline instead of throwing the error.