error in AUTHENTICATION using socialregistration

[Avnesh Shakya]

hi,
   I am getting error - 
         

      NoReverseMatch at /login/

   u'facebook' is not a registered namespace inside 'socialregistration'

when I am clicking on login link. I have installed all required things using documantation - 
   http://django-socialregistration.readthedocs.org/en/latest/contrib/facebook.html
but it's showing error.
Please help me... I am unable to find this error.

settings.py- i have added-
INSTALLED_APPS = (
    'apps.socialregistration',

    'apps.socialregistration.contrib.facebook',

    )

and
AUTHENTICATION_BACKENDS = (

        'django.contrib.auth.backends.ModelBackend',

        'apps.socialregistration.contrib.facebook.auth.FacebookAuth',

)



FACEBOOK_APP_ID = '278691145597349'

FACEBOOK_SECRET_KEY = '359ed87e4cc3b3cdf2e567f7ab043d8c'

and in login.html page
i have added-
{% load facebook %}

{% facebook_button %}

thanks in advance.

[rafiee.nima]

did you add facebook namespace in your main project urls.py  ?