Hey there @tjb, I apologize for the delay in response.
I understand this challenge was posted some time ago but I wanted to see if you are still battling today? If so, when you get a chance can you please clear your browser cookies and give this another I would appreciate it. Please let me know if this helps you or if you have any additional questions.
Due to the age of this question I will leave it open for another ten days unless I hear otherwise from you, thank you.