Django: serving static file on debug=false

I know this question was asked many times, but none of the answers i found and tried helped me.

Those are my static files settings:

STATIC_ROOT = os.path.abspath(SETTINGS_PATH+'/staticfiles/')

# URL prefix for static files.
# Example: "http://media.lawrence.com/static/"
STATIC_URL = '/staticfiles/'

# Additional locations of static files
STATICFILES_DIRS = (
    # Put strings here, like "/home/html/static" or "C:/www/django/static".
    # Always use forward slashes, even on Windows.
    # Don't forget to use absolute paths, not relative paths.
    os.path.join(os.path.dirname(__file__), 'static'),
    )

# List of finder classes that know how to find static files in
# various locations.
STATICFILES_FINDERS = (
    'django.contrib.staticfiles.finders.FileSystemFinder',
    'django.contrib.staticfiles.finders.AppDirectoriesFinder',
#    'django.contrib.staticfiles.finders.DefaultStorageFinder',
) 

And in myapp/urls.py:

from django.conf.urls import patterns, include, url
from django.conf import settings
from django.contrib import admin
from django.contrib.staticfiles.urls import staticfiles_urlpatterns

admin.autodiscover()

urlpatterns = patterns('',
    # urls
)

urlpatterns += staticfiles_urlpatterns()

Collectstatic copies all files to staticfiles/ as it should and i get 404 on all static files.

I also tried this in urls.py:

if not settings.DEBUG:
    urlpatterns += patterns('',
        url(r'^staticfiles/(?P<path>.*)$', 'django.views.static.serve',
            {'document_root': settings.STATIC_ROOT}),
    )

This gives me following kind of errors:

Resource interpreted as Stylesheet but transferred with MIME type text/html:  "http://localhost:8000/?next=/staticfiles/css/bootstrap.css". localhost:11
Resource interpreted as Stylesheet but transferred with MIME type text/html: "http://localhost:8000/?next=/staticfiles/css/style.