Django Registration Redux: Add Fields To User Profile error -

i trying add extended fields user, save user info not field in new table.

this model:

class userprofile(models.model):     field = models.charfield(max_length=3)     user = models.onetoonefield(user, unique=true) 

here form:

class userprofileregistrationform(registrationformuniqueemail):     field = forms.charfield() 

regbackend.py

class userregistrationview(registrationview):      form_class = userprofileregistrationform      def register(self, request, form_class):         new_user = super(userregistrationview, self).register(request, form_class)         new_user.field = form_class.cleaned_data['field']         new_user.save()         user_profile = new_user.get_profile()         user_profile.field = form_class.cleaned_data['field']         user_profile.save()         return user_profile 

and urls.py

urlpatterns = patterns('',     url(r'^$', index_view),     url(r'^accounts/register/$', regbackend.userregistrationview.as_view(), name='registration_register'),     url(r'^accounts/', include('registration.backends.default.urls')), ) 

any idea issue be?