AttributeError: 'WSGIRequest' object has no attribute 'session'

I keep getting this error at random times and whenever I touch the django.wsgi file, it gets fixed only to happen again after a few hours. I'm lost as to what to do. my middleware_classes is as follows:

MIDDLEWARE_CLASSES = (
'django.middleware.cache.UpdateCacheMiddleware',
'django.middleware.common.CommonMiddleware',
'django.contrib.sessions.middleware.SessionMiddleware',
'django.middleware.locale.LocaleMiddleware',
'django.middleware.csrf.CsrfViewMiddleware',
'django.middleware.csrf.CsrfResponseMiddleware',
'django.contrib.auth.middleware.AuthenticationMiddleware',
'django.middleware.facebookConnectMiddleware.FacebookConnectMiddleware',
'django.contrib.messages.middleware.MessageMiddleware',
'django.middleware.cache.FetchFromCacheMiddleware',
'django.contrib.flatpages.middleware.FlatpageFallbackMiddleware',
).

The error always occurs in the facebook middleware when i do an "if request.session" statement.
Thanks

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