Direccionamiento en caso que el login sea incorrecto

{% extends "base.html" %}

{% block content %}

{% if form.errors %}
    <p class="error">Disculpa, el nombre de usuario o contraseña no coinciden.</p>
{% endif %}

<form id="login" action="{% url django.contrib.auth.views.login %}" method="post">
  {% csrf_token %}
  <label class="label" for="username">Usuario:</label>
  <input class="campos" type="text" name="username" value="" id="username">
  <label class="label" for="password">Contraseña:</label>
  <input class="campos" type="password" name="password" value="" id="password">
  <input class="boton" type="submit" value="Ingresar" />
</form>

{% endblock %}

#-*- coding: utf-8 -*-
import datetime
from django.http import HttpResponse
from django.http import HttpResponseRedirect
from django.shortcuts import render_to_response
from django.views.decorators.csrf import csrf_protect
from django.template.context import RequestContext
from django.contrib.auth import authenticate, login
from django.contrib.auth.forms import AuthenticationForm
from django.core.context_processors import csrf
from models import MarcaVehiculo, Cliente
from django.contrib.auth.decorators import login_required

def pagina_index(request):
    mensaje = "Esta es la Página de Index"
    context = {
    'msg': mensaje,
    }
    return render_to_response('index.html', context, context_instance=RequestContext(request))

def login(request):
    username = request.POST['username']
    password = request.POST['password']
    user = authenticate(username=username, password=password)
    if user is not None:
        if user.is_active:
            login(request, user)
        else:
            print "El Usuario no se encuentra activo..."
    else:
        print "Los datos ingresados no son correctos..."

def logout(request):
    logout(request)

@login_required
def loggedin(request):
    context={
    }
    return render_to_response('inicio.html', context)

@login_required
def listadoClientes(request):
    clientes = Cliente.objects.all()
    context = {
    'clientes' : clientes,
    }
    return render_to_response('clientes.html',  context, context_instance=RequestContext(request))125

#-*- coding: utf-8 -*-
import os.path

from django.contrib.auth.views import logout, login 
from django.conf.urls.defaults import *
from taller.vehiculo.views import pagina_index, loggedin, listadoClientes

# Uncomment the next two lines to enable the admin:
from django.contrib import admin
admin.autodiscover()

urlpatterns = patterns('',
    # Example:
    #(r'^taller/', include('taller.foo.urls')),

    # Uncomment the admin/doc line below to enable admin documentation:
    # (r'^admin/doc/', include('django.contrib.admindocs.urls')),

    (r'^$', pagina_index),
    (r'^admin/', include(admin.site.urls)),
    (r'^media/(?P<path>.*)$', 'django.views.static.serve',{'document_root': os.path.join(os.path.dirname(__file__), 'media')}),
    (r'^inicio/$', loggedin),
    (r'^salir/$', logout),
    (r'^clientes/$', listadoClientes),
    (r'^account/login/$', 'django.contrib.auth.views.login'),

)

TemplateDoesNotExist at /account/login/
registration/login.html
Request Method: POST
Request URL:    http://localhost:8000/account/login/
Django Version: 1.3
Exception Type: TemplateDoesNotExist
Exception Value:    
registration/login.html125