[mod_python] Example doesn't work

Hello list,
WARNING: Newbie here...

I've been trying to get the example site running..

http://www.modpython.org/examples/psp_site/

But I'm getting this error:
*******************************************************
mod_python error: "PythonHandler mod_python.publisher"

Traceback (most recent call last):

   File "/usr/lib/python2.3/site-packages/mod_python/apache.py", line 
299, in HandlerDispatch
     result = object(req)

   File "/usr/lib/python2.3/site-packages/mod_python/publisher.py", line 
98, in handler
     path=[path])

   File "/usr/lib/python2.3/site-packages/mod_python/apache.py", line 
454, in import_module
     f, p, d = imp.find_module(parts[i], path)

ImportError: No module named HTTP_NOT_FOUND
*******************************************************

Running:

python-2.3.3-3
mod_python-3.1.3-2

Please help.
Thanks.


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