django.db.utils.ProgrammingError: relation "blogango_blog" does not exist

I'm trying to create a blog using django-blogango given at "https://github.com/agiliq/django-blogango" using the following code

settings.py

INSTALLED_APPS = (
    'django.contrib.admin',
    'django.contrib.auth',
    'django.contrib.sites',
    'django.contrib.comments',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.messages',
    'django.contrib.staticfiles',
    'django.contrib.sitemaps',
    'debug_toolbar',
    'blogango', 
    'pingback', 
    'taggit',
    'django_xmlrpc',
    'google_analytics',
    'south',

)

DATABASES = {
         'default': {
             'ENGINE': 'django.db.backends.postgresql_psycopg2',
             'NAME': 'mydb',
             'USER': 'myuser',
             'PASSWORD': 'mypassword',
             'HOST': 'localhost',
             'PORT': '',
         }
    }

when i run syncdb command it gives error "django.db.utils.ProgrammingError: relation "blogango_blog" does not exist". What am I doing wrong?