django.core.exceptions.ImproperlyConfigured:

[Misael Taveras]

Hi there,

When I add 'filer' to my INSTALLED_APPS tuple, throw me this exception and I don't know what could be. And its just with this package.

"django.core.exceptions.ImproperlyConfigured: Creating a ModelForm without either

 the 'fields' attribute or the 'exclude' attribute is prohibited; form UploadFileForm needs updating."

This is my settings.py

from django.contrib.staticfiles import *

....

INSTALLED_APPS = (

    'mptt',

    'filer',

    'easy_thumbnails',

    'django.contrib.admin',

    'django.contrib.auth',

    'django.contrib.contenttypes',

    'django.contrib.sessions',

    'django.contrib.messages',

    'django.contrib.staticfiles',

    'download', #the app i've created

)

THUMBNAIL_HIGH_RESOLUTION = True

THUMBNAIL_PROCESSORS = (

    'easy_thumbnails.processors.colorspace',

    'easy_thumbnails.processors.autocrop',

    #'easy_thumbnails.processors.scale_and_crop',

    'filer.thumbnail_processors.scale_and_crop_with_subject_location',

    'easy_thumbnails.processors.filters',

)

It really can help me with this, I'm stuck. Thank you!