Django threadedcomments

I would like to set up comment systems on my site using django threadedcomments and I follow all the steps in the Tutorial, however I get the following error:

No module named newforms.util

I'm not sure what is causing this problem, here is my config:

#settings.py
INSTALLED_APPS = (
    'django.contrib.admin',
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.sites',    
    'myproject.myapp',
    'threadedcomments',    
)


#urls.py

from django.conf import settings
from django.conf.urls.defaults import *
from django.contrib import admin

admin.autodiscover()

urlpatterns = patterns('',

    (r'^admin/', include(admin.site.urls)),
    (r'^threadedcomments/', include('threadedcomments.urls')),
)

      

        
        
        
      

    

Please let me know if there is another better comment for comments if the comment system is flexible and capable of many customizations, as well as threadedcomment, of coz, integrating with the rating, I'm happy to use another one.

Thanks guys.