invenio apache.err

[Thu Sep 02 10:34:39 2010] [error] /usr/local/lib/python2.6/dist-packages/pyRXP-1.13-py2.6-linux-i686.egg/pyRXP.py:3: UserWarning: Module _mysql was already imported from /usr/lib/pymodules/python2.6/_mysql.so, but /usr/lib/pymodules/python2.6 is being added to sys.path
[Thu Sep 02 10:34:40 2010] [error] [client 131.142.42.128] mod_wsgi (pid=13249): Target WSGI script '/opt/invenio/invenio/var/www-wsgi/invenio.wsgi' cannot be loaded as Python module.
[Thu Sep 02 10:34:40 2010] [error] [client 131.142.42.128] mod_wsgi (pid=13249): Exception occurred processing WSGI script '/opt/invenio/invenio/var/www-wsgi/invenio.wsgi'.
[Thu Sep 02 10:34:40 2010] [error] [client 131.142.42.128] Traceback (most recent call last):
[Thu Sep 02 10:34:40 2010] [error] [client 131.142.42.128]   File "/opt/invenio/invenio/var/www-wsgi/invenio.wsgi", line 23, in <module>
[Thu Sep 02 10:34:40 2010] [error] [client 131.142.42.128]     from invenio.webinterface_handler_wsgi import application
[Thu Sep 02 10:34:40 2010] [error] [client 131.142.42.128]   File "/usr/lib/python2.6/dist-packages/invenio/webinterface_handler_wsgi.py", line 35, in <module>
[Thu Sep 02 10:34:40 2010] [error] [client 131.142.42.128]     from invenio.webinterface_layout import invenio_handler
[Thu Sep 02 10:34:40 2010] [error] [client 131.142.42.128]   File "/usr/lib/python2.6/dist-packages/invenio/webinterface_layout.py", line 210, in <module>
[Thu Sep 02 10:34:40 2010] [error] [client 131.142.42.128]     class WebInterfaceInvenio(WebInterfaceSearchInterfacePages):
[Thu Sep 02 10:34:40 2010] [error] [client 131.142.42.128]   File "/usr/lib/python2.6/dist-packages/invenio/webinterface_layout.py", line 261, in WebInterfaceInvenio
[Thu Sep 02 10:34:40 2010] [error] [client 131.142.42.128]     kb = WebInterfaceBibKnowledgePages()
[Thu Sep 02 10:34:40 2010] [error] [client 131.142.42.128] NameError: name 'WebInterfaceBibKnowledgePages' is not defined