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

Traceback (most recent call last):

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

  File "/usr/lib/python2.5/site-packages/django/core/handlers/modpython.py", line 189, in handler
    return ModPythonHandler()(req)

  File "/usr/lib/python2.5/site-packages/django/core/handlers/modpython.py", line 166, in __call__
    response = middleware_method(request, response)

  File "/usr/lib/python2.5/site-packages/django/contrib/sessions/middleware.py", line 37, in process_response
    request.session.save()

  File "/usr/lib/python2.5/site-packages/django/contrib/sessions/backends/db.py", line 42, in save
    session_key = self.session_key,

  File "/usr/lib/python2.5/site-packages/django/contrib/sessions/backends/base.py", line 109, in _get_session_key
    self._session_key = self._get_new_session_key()

  File "/usr/lib/python2.5/site-packages/django/contrib/sessions/backends/base.py", line 101, in _get_new_session_key
    if not self.exists(session_key):

  File "/usr/lib/python2.5/site-packages/django/contrib/sessions/backends/db.py", line 35, in exists
    Session.objects.get(session_key=session_key)

  File "/usr/lib/python2.5/site-packages/django/db/models/manager.py", line 82, in get
    return self.get_query_set().get(*args, **kwargs)

  File "/usr/lib/python2.5/site-packages/django/db/models/query.py", line 192, in get
    num = len(clone)

  File "/usr/lib/python2.5/site-packages/django/db/models/query.py", line 53, in __len__
    self._result_cache = list(self.iterator())

  File "/usr/lib/python2.5/site-packages/django/db/models/query.py", line 162, in iterator
    for row in self.query.results_iter():

  File "/usr/lib/python2.5/site-packages/django/db/models/sql/query.py", line 200, in results_iter
    for rows in self.execute_sql(MULTI):

  File "/usr/lib/python2.5/site-packages/django/db/models/sql/query.py", line 1465, in execute_sql
    cursor = self.connection.cursor()

  File "/usr/lib/python2.5/site-packages/django/db/backends/__init__.py", line 33, in cursor
    cursor = self._cursor(settings)

  File "/usr/lib/python2.5/site-packages/django/db/backends/oracle/base.py", line 214, in _cursor
    self.connection = Database.connect(settings.DATABASE_USER, settings.DATABASE_PASSWORD, dsn, **self.options)

DatabaseError: ORA-28000: the account is locked