How can I deal with this django Page not found error (404)

I am building this django app using a tutorial and I am up to part 4 https://docs.djangoproject.com/en/dev/intro/tutorial04/

The app displays the main poll and when you click on it, it displays some options and a button to vote.

The problem is when I click on the vote. The page display was not found. I think the problem is with the redirect, but I don't know where to point the problem. The first page contains index.html, which displays the questions, and then detail.html, which displays the selection and question. I know when I click on the vote it goes back to the app url and urlconf does the view function and the view function does the results.

My detail.html

 <h1>{{ poll.question }}</h1>

 {% if error_message %}<p><strong>{{ error_message }}</strong></p>{% endif %}

 <form action="/myapp/{{ poll.id }}/vote/" method="post">
 {% csrf_token %}
 {% for choice in poll.choice_set.all %}
     <input type="radio" name="choice" id="choice{{ forloop.counter }}" value="{{ choice.id }}" />
     <label for="choice{{ forloop.counter }}">{{ choice.choice_text }}</label><br />
 {% endfor %}
 <input type="submit" value="Vote" />
 </form>

      

        
        
        
      

    

My urls.py inside myapp:

from django.conf.urls import patterns, include, url
from django.contrib import admin
from django.conf import settings

from django.conf.urls import patterns, include, url

urlpatterns = patterns('myapp.views',
    url(r'^$', 'index'),
    url(r'^(?P<poll_id>\d+)/$', 'detail'),
    url(r'^(?P<poll_id>\d+)/results/$', 'results'),
    url(r'^(?P<poll_id>\d+)/vote/$', 'vote'),
)

      

        
        
        
      

    

My views.py:

from django.http import HttpResponse
from myapp.models import Poll ,choice
from django.template import Context, loader
from django.http import Http404
from django.shortcuts import render_to_response, get_object_or_404
from django.template import RequestContext

def index(request):
    latest_poll_list = Poll.objects.all().order_by('-pub_date')[:5]
    return render_to_response('myapp/index.html', {'latest_poll_list': latest_poll_list})

def results(request, poll_id):
    p = get_object_or_404(Poll, pk=poll_id)
    return render_to_response('myapp/results.html', {'poll': p})

def vote(request, poll_id):
    p = get_object_or_404(Poll, pk=poll_id)
    try:
        selected_choice = p.choice_set.get(pk=request.POST['choice'])
    except (KeyError, Choice.DoesNotExist):
        # Redisplay the poll voting form.
        return render_to_response('myapp/detail.html', {
            'poll': p,
            'error_message': "You didn't select a choice.",
        }, context_instance=RequestContext(request))
    else:
        selected_choice.votes += 1
        selected_choice.save()
    # Always return an HttpResponseRedirect after successfully dealing
    # with POST data. This prevents data from being posted twice if a
    # user hits the Back button.
        return HttpResponseRedirect(reverse('myapp.views.results', args=(p.id,)))

def detail(request, poll_id):
    p = get_object_or_404(Poll, pk=poll_id)
    return render_to_response('myapp/detail.html', {'poll': p},
                           context_instance=RequestContext(request))

      

        
        
        
      

    

My .html results:

<h1>{{ poll.question }}</h1>

<ul>
{% for choice in poll.choice_set.all %}
    <li>{{ choice.choice_text }} -- {{ choice.votes }} vote{{ choice.votes|pluralize }}</li>
{% endfor %}
</ul>

<a href="/myapp/{{ poll.id }}/">Vote again?</a>

      

        
        
        
      

    

Thanks for helping me. This will be my first breakthrough app if I can get it to work.

My main url:

from django.conf.urls import patterns, include, url
from django.contrib import admin
from django.conf import settings
# Uncomment the next two lines to enable the admin:
# from django.contrib import admin
admin.autodiscover()

urlpatterns = patterns('',
    url(r'^polls/', include('myapp.urls')),
    url(r'^admin/', include(admin.site.urls)),
)