Hello to all,
I have a problem with the Django admin.
When I want to access it I get this error:

Code:
ImportError at /admin/
No module named django.contrib.syndication
Request Method:	GET
Request URL:	http://127.0.0.1:8000/admin/
Django Version:	1.4
Exception Type:	ImportError
Exception Value:	
No module named django.contrib.syndication
Exception Location:	/usr/local/lib/python2.7/dist-packages/django/utils/importlib.py in import_module, line 35
Python Executable:	/usr/bin/python
Python Version:	2.7.3
Python Path:	
['/home/brussels/WEB/Python/Django/pHCOW',
 '/usr/local/lib/python2.7/dist-packages/Genshi-0.6-py2.7.egg',
 '/usr/local/lib/python2.7/dist-packages/Trac-0.12.3-py2.7.egg',
 '/usr/local/lib/python2.7/dist-packages/django_blog_zinnia-0.10.dev-py2.7.egg',
 '/usr/local/lib/python2.7/dist-packages/pyparsing-1.5.6-py2.7.egg',
 '/usr/local/lib/python2.7/dist-packages/django_xmlrpc-0.1.3-py2.7.egg',
 '/usr/local/lib/python2.7/dist-packages/django_tagging-0.3.1-py2.7.egg',
 '/usr/local/lib/python2.7/dist-packages/django_mptt-0.5.2-py2.7.egg',
 '/usr/local/lib/python2.7/dist-packages/BeautifulSoup-3.2.1-py2.7.egg',
 '/usr/lib/python2.7',
 '/usr/lib/python2.7/plat-linux2',
 '/usr/lib/python2.7/lib-tk',
 '/usr/lib/python2.7/lib-old',
 '/usr/lib/python2.7/lib-dynload',
 '/usr/local/lib/python2.7/dist-packages',
 '/usr/lib/python2.7/dist-packages',
 '/usr/lib/python2.7/dist-packages/PIL',
 '/usr/lib/python2.7/dist-packages/gst-0.10',
 '/usr/lib/python2.7/dist-packages/gtk-2.0',
 '/usr/lib/pymodules/python2.7',
 '/usr/lib/python2.7/dist-packages/ubuntu-sso-client',
 '/usr/lib/python2.7/dist-packages/ubuntuone-client',
 '/usr/lib/python2.7/dist-packages/ubuntuone-control-panel',
 '/usr/lib/python2.7/dist-packages/ubuntuone-couch',
 '/usr/lib/python2.7/dist-packages/ubuntuone-installer',
 '/usr/lib/python2.7/dist-packages/ubuntuone-storage-protocol']
But the module django.contrib.admin is enabled
and previously I'd not received any such message.

Have you any idea what could cause this error?

Thank you.