Django-Cms Installation Error with stable Version

I am use Install the Django-Cms using this link
http://www.django-cms.org/en/documentation/2.0/installation/

I face this error. I am able understand this error
I am using Django Version is 1.1.2 and Django -cms is 2.0.2
Version is matching with Documentation of Django-Cms
ERROR is : -
{
ImproperlyConfigured at /

'PageAdmin.exclude' refers to field 'created_by' that is missing from
the form.

Request Method: GET
Request URL: http://localhost/djangocms/
Exception Type: ImproperlyConfigured
Exception Value:

'PageAdmin.exclude' refers to field 'created_by' that is missing from
the form.

Exception Location: /usr/local/lib/python2.6/dist-packages/django/
contrib/admin/validation.py in check_formfield, line 310
Python Executable: /usr/bin/python
Python Version: 2.6.5

}

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