title: celery beat doesn't work properly
body: <p>when i run this command for celery beat. </p>
  
  <blockquote>
    <p>[2013-06-27 02:17:05,936: INFO/MainProcess] Celerybeat: Starting...</p>
    
    <p>[2013-06-27 02:17:05,937: INFO/MainProcess] Writing entries...</p>
    
    <p>[2013-06-27 02:17:08,711: INFO/MainProcess] DatabaseScheduler: Schedule changed.</p>
    
    <p>[2013-06-27 02:17:08,712: INFO/MainProcess] Writing entries...</p>
  </blockquote>
  
  <p>it is stuck on this result. but in my settings.py I have configured the CELERYBEAT_SCHEDULE.</p>
  
  <pre><code>CELERYBEAT_SCHEDULER = "djcelery.schedulers.DatabaseScheduler"
  
  from datetime import timedelta
  
  CELERYBEAT_SCHEDULE = {
      'add-every-30-seconds': {
      'task': 'celerytest.tasks.add',
      'schedule': timedelta(seconds=30),
      'args': (16, 16)
      },
  
      'add-every-10-seconds': {
      'task': 'celerytest.tasks.minus',
      'schedule': timedelta(seconds=10),
      'args': (20, 16)
      },
  
  }
  </code></pre>
  
  <p>What's wrong with my celery beat? </p>