title: sorl-thumbnail is not working in django
body: <p>I am using sorl-thumbnail to dynamically create thumbnails in my django project.</p>
  
  <p>This is my HTML code is:</p>
  
  <pre><code>&lt;html&gt;
  &lt;head&gt;&lt;title&gt;mypage&lt;/title&gt;
  &lt;% load thumbnail %}
  &lt;div class="logo"&gt;
         &lt;a href=""&gt;
      {% thumbnail "http://www.aino.se/media/i/logo.png" "40x40" as im %}
          &lt;img src="{{ im.url }}"&gt;
          {% endthumbnail %}
         &lt;/a&gt;
  &lt;/div&gt;
  &lt;/html&gt;
  </code></pre>
  
  <p>And this is my <code>settings.py</code></p>
  
  <pre><code>MIDDLEWARE_CLASSES = (
      'django.middleware.common.CommonMiddleware',
      'django.contrib.sessions.middleware.SessionMiddleware',
      ..... 
  
      'django.middleware.cache.UpdateCacheMiddleware',
      "django.middleware.cache.FetchFromCacheMiddleware",
  
      # Uncomment the next line for simple clickjacking protection:
      # 'django.middleware.clickjacking.XFrameOptionsMiddleware',
  )
  
  
  INSTALLED_APPS = (
      'django.contrib.auth',
      'django.contrib.contenttypes',
       .......
      "sorl.thumbnail",
  )
  
  CACHES = {
      'default': {
          'BACKEND': 'django.core.cache.backends.filebased.FileBasedCache',
          'LOCATION': 'd:/code/,
      }
  }
  </code></pre>
  
  <p>I am not getting any error and no thumbnails either!</p>