pythondjango訪問靜態文件出現404或500錯誤

import os
PROJECT_ROOT = os.path.dirname(__file__)

DEBUG = True

STATIC_URL = '/static/'

STATICFILES_DIRS = (

 os.path.join(PROJECT_ROOT, 'static'),
)

STATICFILES_FINDERS = (
 'django.contrib.staticfiles.finders.FileSystemFinder',
 'django.contrib.staticfiles.finders.AppDirectoriesFinder',
)

<VirtualHost *:80>
 ServerName www.mydjangosite.com
 ServerAlias mydjangosite.com
 ServerAdmin fake@mydjangosite.com

 DocumentRoot /path/to/mydjangosite
 <Directory /path/to/mydjangosite>
 Options FollowSymLinks
 AllowOverride None
 Order allow,deny
 allow from all
 </Directory>

 Alias /static/ /path/to/mydjangosite/static/
 <Directory /path/to/mydjangosite/static>
 Order allow,deny
 allow from all
 </Directory>

 # The following installs the Django WSGI app
 WSGIDaemonProcess www.mydjangosite.com processes=2 threads=15 display-name=%{GROUP}
 WSGIProcessGroup www.mydjangosite.com
 WSGIScriptAlias / /path/to/mydjangosite/wsgi.py

</VirtualHost>