title: Magento Cron not working: no heartbeat task
body: <p>I noticed the cron jobs not working because some tasks were not performed (automatic feed generation, google sitemap, ...).</p>
  
  <p>1) I installed the (very useful) AOE scheduler</p>
  
  <p>2) I've checked cron_schedule SQL table via PHPmyAdmin: no task is generated, but if I press Generate schedule in AOE scheduler, a list of task is generated. All tasks remain in pending status (executed at NULL).</p>
  
  <p>3) I've set (crontab -e) 
  0,5,10,15,20,25,30,35,40,45,50,55 * * * * /home/fpl/webapps/magento/cron.sh</p>
  
  <p>I've tried to run cron.sh manually via SSH. When I run manually the sh the heartbeat task is run. So I'm also sure the problem is not in the cron.sh script.</p>
  
  <p><em>Cron is properly running on the server.</em></p>
  
  <p><strong>Configuration</strong></p>
  
  <p>Webfaction hosting
  Magento ver. 1.8.0.0</p>
  
  <p>Cron schedule Configuration on magento admin panel
  Generate Schedules Every 1
  Schedule Ahead for 20 
  Missed if Not Run Within 15
  Heartbeat task schedule (cron syntax) 0,5,10,15,20,25,30,35,40,45,50,55 * * * *</p>
  
  <p>Thanks for your help!</p>