Newbie Question: Django Tutorial Part 4 - Exception Issue

Hi,

I am following Django official tutorial and have unanswered issue at part 4, https://docs.djangoproject.com/en/1.7/intro/tutorial04/. Here is the exception handling code,

    except (KeyError, Choice.DoesNotExist):          # Redisplay the question voting form.          return render(request, 'polls/detail.html', {              'question': p,              'error_message': "You didn't select a choice.",          })

When I run the server and click on [Vote] without selecting a choice, the page does NOT show me the error message. The same voting page comes back as if [Vote] was not clicked.
I checked my lines and everything seems identical per tutorial.

Any help appreciated!
Thanks

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