Menu link does not show

Hello all,

I followed the screencast on developmentseed.org in order to play around with spaces alpha3. Very nice to follow btw. I executed the tutorial with blog node type and everything worked.

Following the tutorial I generated a new view for a different node type. Afterwards I generated a context definition as follows:

$items[] = array (
  'namespace' => 'spaces',
  'attribute' => 'feature',
  'value' => 'file_archive',
  'node' => 
  array (
    'file' => 'file',
  ),
  'views' => 
  array (
    'spaces_files' => 'spaces_files',
  ),
  'spaces' => 
  array (
    'label' => 'File archive',
    'description' => 'Access file archive',
    'menu' => 
    array (
      0 => 
      array (
        'title' => 'File archive',
        'href' => 'file_archive',
      ),
    ),
    'types' => 
    array (
      'site' => 'site',
      'taxonomy' => 0,
      'user' => 0,
    ),
  ),
  'theme_section' => 
  array (
    'title' => 'file_archive',
    'subtitle' => 'file_archive',
    'class' => 'file_archive',
  ),
);

Applying the source for primary-links in admin/build/menu showed the blog menu item, but the new context definition for file_archive is not shown, although I entered a menu definition as can be seen from above.

What am I missing? Hints are greatly appreciated

Best wishes

Sebastian