Middleware Issue

[odellus]

I went through all of the steps on the tutorial to get the example working, but when I direct my browser to 127.0.0.1:8000 to see the development page, I get the following error.

AssertionError at / The Django authentication middleware requires session middleware to be installed. Edit your MIDDLEWARE_CLASSES setting to insert 'django.contrib.sessions.middleware.SessionMiddleware'.

When I scroll down the page to look at my settings, I find the following to be defined:

MIDDLEWARE_CLASSES

('django.middleware.common.CommonMiddleware',
'django.middleware.doc.XViewMiddleware',
'django.contrib.auth.middleware.AuthenticationMiddleware',
'django.contrib.sessions.middleware.SessionMiddleware')

Not sure what to do next. : )