There is no new content (for first import, of populated rss)

I have created the bellow feed importer but when I try to create a node to import the feed (http://followgram.me/joshbeaureg/rss) feeds returns, "There is no new content")

FEED EXPORT

$feeds_importer = new stdClass;
$feeds_importer->disabled = FALSE; /* Edit this to true to make a default feeds_importer disabled initially */
$feeds_importer->api_version = 1;
$feeds_importer->id = 'fo';
$feeds_importer->config = array(
  'name' => 'followgram parser',
  'description' => '',
  'fetcher' => array(
    'plugin_key' => 'FeedsHTTPFetcher',
    'config' => array(
      'auto_detect_feeds' => FALSE,
      'use_pubsubhubbub' => FALSE,
      'designated_hub' => '',
    ),
  ),
  'parser' => array(
    'plugin_key' => 'FeedsSyndicationParser',
    'config' => array(),
  ),
  'processor' => array(
    'plugin_key' => 'FeedsNodeProcessor',
    'config' => array(
      'content_type' => 'instagram',
      'input_format' => '0',
      'update_existing' => '0',
      'expire' => '259200',
      'mappings' => array(
        0 => array(
          'source' => 'title',
          'target' => 'title',
          'unique' => FALSE,
        ),
        1 => array(
          'source' => 'title',
          'target' => 'body',
          'unique' => FALSE,
        ),
        2 => array(
          'source' => 'guid',
          'target' => 'guid',
          'unique' => FALSE,
        ),
        3 => array(
          'source' => 'description',
          'target' => 'field_instagram_image:fig',
          'unique' => FALSE,
        ),
      ),
      'author' => 0,
      'authorize' => 0,
    ),
  ),
  'content_type' => 'instagram_feed',
  'update' => 0,
  'import_period' => '1800',
  'expire_period' => 3600,
  'import_on_create' => 1,
);