How can I fix this site5 CsrfResponseMiddleware installation error?

Hi,I am on site5.com hosting. I asked support team to install osqa for me but they have some issue with installation.

    Traceback (most recent call last): 
File "build/bdist.linux-x86_64/egg/flup/server/fcgi_base.py", line 558, in run protocolStatus, appStatus = self.server.handler(self) 
File "build/bdist.linux-x86_64/egg/flup/server/fcgi_base.py", line 1118, in handler result = self.application(environ, start_response) 
File "/home/eansweri/local/lib/python2.6/site-packages/django/core/handlers/wsgi.py", line 208, in __call__ self.load_middleware() 
File "/home/eansweri/local/lib/python2.6/site-packages/django/core/handlers/base.py", line 51, in load_middleware 
raise exceptions.ImproperlyConfigured('Middleware module "%s" does not define a "%s" class' % (mw_module, mw_classname)) 
ImproperlyConfigured: Middleware module "django.middleware.csrf" does not define a "CsrfResponseMiddleware" class