Mod_python error: "PythonHandler django_dev.core.handlers.modpython"

Traceback (most recent call last):

  File "/usr/local/lib/python2.4/site-packages/mod_python/apache.py", line 287, in HandlerDispatch
    log=debug)

  File "/usr/local/lib/python2.4/site-packages/mod_python/apache.py", line 464, in import_module
    module = imp.load_module(mname, f, p, d)

  File "/home/ashwoods/lib/python2.4/django_dev/core/handlers/modpython.py", line 7, in ?
    from django.core.urlresolvers import set_script_prefix

ImportError: cannot import name set_script_prefix