when i move the "/usr/local/lib" back with command "sudo mv /usr/local/lib.old/ /usr/local/lib", "Internal Server Error" happens again. but if i move /usr/local/lib to /usr/local/lib.old, the error does not happen, and it becames normal. log info in "/var/log/apache2/error.log" is as bellow, can you help me to resolve this error? [Thu Jun 16 01:44:33 2011] [error] /usr/local/lib/python2.6/dist-packages/Django-1.3-py2.6.egg/django/contrib/csrf/middleware.py:6: DeprecationWarning: This import for CSRF functionality is deprecated. Please use django.middleware.csrf for the middleware and django.views.decorators.csrf for decorators. 615 [Thu Jun 16 01:44:33 2011] [error] DeprecationWarning 616 [Thu Jun 16 01:44:33 2011] [error] [client 127.0.0.1] mod_wsgi (pid=3810): Exception occurred processing WSGI script '/etc/launch-control/web-server/apache2/standard.wsgi'. 617 [Thu Jun 16 01:44:33 2011] [error] [client 127.0.0.1] Traceback (most recent call last): 618 [Thu Jun 16 01:44:33 2011] [error] [client 127.0.0.1] File "/usr/local/lib/python2.6/dist-packages/Django-1.3-py2.6.egg/django/core/handlers/wsgi.py", line 273, in __call_ _ 619 [Thu Jun 16 01:44:33 2011] [error] [client 127.0.0.1] response = self.get_response(request) 620 [Thu Jun 16 01:44:33 2011] [error] [client 127.0.0.1] File "/usr/local/lib/python2.6/dist-packages/Django-1.3-py2.6.egg/django/core/handlers/base.py", line 169, in get_res ponse 621 [Thu Jun 16 01:44:33 2011] [error] [client 127.0.0.1] response = self.handle_uncaught_exception(request, resolver, sys.exc_info()) 622 [Thu Jun 16 01:44:33 2011] [error] [client 127.0.0.1] File "/usr/local/lib/python2.6/dist-packages/Django-1.3-py2.6.egg/django/core/handlers/base.py", line 214, in handle_ uncaught_exception 623 [Thu Jun 16 01:44:33 2011] [error] [client 127.0.0.1] if resolver.urlconf_module is None: 624 [Thu Jun 16 01:44:33 2011] [error] [client 127.0.0.1] File "/usr/local/lib/python2.6/dist-packages/Django-1.3-py2.6.egg/django/core/urlresolvers.py", line 274, in _get_url conf_module 625 [Thu Jun 16 01:44:33 2011] [error] [client 127.0.0.1] self._urlconf_module = import_module(self.urlconf_name) 626 [Thu Jun 16 01:44:33 2011] [error] [client 127.0.0.1] File "/usr/local/lib/python2.6/dist-packages/Django-1.3-py2.6.egg/django/utils/importlib.py", line 35, in import_modu le 627 [Thu Jun 16 01:44:33 2011] [error] [client 127.0.0.1] __import__(name) 628 [Thu Jun 16 01:44:33 2011] [error] [client 127.0.0.1] File "/usr/lib/pymodules/python2.6/dashboard_server/urls.py", line 25, in 629 [Thu Jun 16 01:44:33 2011] [error] [client 127.0.0.1] from dashboard_app.views import dashboard_xml_rpc_handler 630 [Thu Jun 16 01:44:33 2011] [error] [client 127.0.0.1] File "/usr/lib/pymodules/python2.6/dashboard_app/views.py", line 33, in 631 [Thu Jun 16 01:44:33 2011] [error] [client 127.0.0.1] from dashboard_app.models import (Attachment, BundleStream, TestRun, TestResult, DataReport) 632 [Thu Jun 16 01:44:33 2011] [error] [client 127.0.0.1] File "/usr/lib/pymodules/python2.6/dashboard_app/models.py", line 41, in 633 [Thu Jun 16 01:44:33 2011] [error] [client 127.0.0.1] from dashboard_app.helpers import BundleDeserializer 634 [Thu Jun 16 01:44:33 2011] [error] [client 127.0.0.1] File "/usr/lib/pymodules/python2.6/dashboard_app/helpers.py", line 11, in 635 [Thu Jun 16 01:44:33 2011] [error] [client 127.0.0.1] from linaro_dashboard_bundle import ( 636 [Thu Jun 16 01:44:33 2011] [error] [client 127.0.0.1] ImportError: cannot import name DocumentIO