Mod_python error: "PythonHandler mod_python.publisher"

Traceback (most recent call last):

  File "/usr/local/lib/python2.5/site-packages/mod_python/apache.py", line 299, in HandlerDispatch
    result = object(req)

  File "/usr/local/lib/python2.5/site-packages/mod_python/publisher.py", line 98, in handler
    path=[path])

  File "/usr/local/lib/python2.5/site-packages/mod_python/apache.py", line 457, in import_module
    module = imp.load_module(mname, f, p, d)

  File "/var/www/vhosts/preleads.com/httpdocs/ClientContent/index.py", line 5, in 
    import database_functions

ImportError: No module named database_functions