python - ImproperlyConfigured at admin -

i've seen question here , trying differents solutions. mean one's refers grappelli because think error around there.

i'm getting error:

module "django.contrib.staticfiles.storage" not define "cachedstaticfiles" attribute/class 

this error refers line 10 on grappelli/templates/admin/base.html,

<link href="{% static "grappelli/jquery/ui/css/custom-theme/jquery-ui-1.10.3.custom.min.css" %}" 

this urls.py:

urlpatterns = patterns('',     url(r'^grappelli/', include('grappelli.urls')),     url(r'^admin/', include(admin.site.urls)), ) 

this settings.py:

debug = true  template_debug = debug  allowed_hosts = ['localhost']  django.conf.global_settings import template_context_processors tcp template_context_processors = tcp + (     'django.core.context_processors.request',     'medio.context_processors.basico', )  grappelli_admin_title = 'my_project'  installed_apps = (     'grappelli',     'django.contrib.admin',     'django.contrib.auth',     'django.contrib.contenttypes',     'django.contrib.sessions',     'django.contrib.messages',     'django.contrib.staticfiles',     'proyecto',     'userprofile', )  middleware_classes = (     'django.contrib.sessions.middleware.sessionmiddleware',     'django.middleware.common.commonmiddleware',     'django.middleware.csrf.csrfviewmiddleware',     'django.contrib.auth.middleware.authenticationmiddleware',     'django.contrib.messages.middleware.messagemiddleware',     'django.middleware.clickjacking.xframeoptionsmiddleware', )  root_urlconf = 'medio.urls'  wsgi_application = 'medio.wsgi.application'  databases = {     'default': {         'engine': 'django.db.backends.mysql',         'name': 'medio2',         'user': 'root',         'password': '',     } }  language_code = 'en-us'  time_zone = 'utc'  use_i18n = true  use_l10n = true  use_tz = true  static_url = '/static/' staticfiles_finders = (     'django.contrib.staticfiles.finders.filesystemfinder',     'django.contrib.staticfiles.finders.appdirectoriesfinder', )   staticfiles_storage = 'django.contrib.staticfiles.storage.cachedstaticfiles' 

replace

staticfiles_storage = 'django.contrib.staticfiles.storage.cachedstaticfiles' 

with

staticfiles_storage = 'django.contrib.staticfiles.storage.cachedstaticfilesstorage'