CustomFeed::YouTubeが動かない？

CustomFeed::YouTubeを使ってみようと思ったけど，なんかうまくいかない……．

Plagger [info] plugin Plagger::Plugin::CustomFeed::YouTube loaded.
Plagger [info] plugin Plagger::Plugin::Publish::Gmail loaded.
Plagger [info] plugin Plagger::Plugin::Bundle::Defaults loaded.
Plagger [info] plugin Plagger::Plugin::Aggregator::Simple loaded.
Plagger [info] plugin Plagger::Plugin::Summary::Auto loaded.
Plagger [info] plugin Plagger::Plugin::Summary::Simple loaded.
Plagger [info] plugin Plagger::Plugin::Namespace::HatenaFotolife loaded.
Plagger [info] plugin Plagger::Plugin::Namespace::MediaRSS loaded.
Plagger [info] plugin Plagger::Plugin::Namespace::ApplePhotocast loaded.
Plagger::Plugin::CustomFeed::YouTube [info] Getting YouTube search results for susumu hirasawa

ここで停止する．Publish::Gmail以外にもNotify::IRCとかPublish::Feedとか試したけど，うまくいかないなぁ．
うーん，わからん……．ちなみにyamlはこんな感じ．

global:
  assets_path: /Users/hogehoge/plagger/assets
  timezone: Asia/Tokyo
  cache:
    base: /tmp
  log:
    level: info
  plugin_path:
    - /Users/hogehoge/plagger/lib/Plagger/Plugin

plugins:

  - module: CustomFeed::YouTube
    config:
      query: susumu hirasawa
      sort: video_date_uploaded
      page: 1

  - module: Publish::Gmail
    config:
      mailto: hogehoge@gmail.com
      mailroute:
        via: smtp_tls
        host: smtp.gmail.com:587
        username: hogehoge@gmail.com
        password: hogehoge