Help with the "Whenever" gem in Ruby for cron tasks

Question

I have not used cron before, so I can't be sure that I did this right. The tasks I want to be automated don't seem to be running. I did these steps in the terminal:

1. sudo gem install whenever
2. change to the application directory
3. wheneverize . (this created the file schedule.rb)

4. I added this code to schedule.rb:

   every 10.minutes do
     runner "User.vote", environment => "development"
   end
   
   
   every :hour do
     runner "Digest.rss", :environment => "development"
   end
   

5. I added this code to deploy.rb:

   after "deploy:symlink", "deploy:update_crontab"
   
   
   namespace :deploy do
     desc "Update the crontab file"
     task :update_crontab, :roles => :db do
       run "cd #{current_path} && whenever --update-crontab #{application}"
     end
   end
   

6. I did this in the terminal: whenever

7. It returned:

   @hourly cd /Users/RedApple/S && script/runner -e development 'Digest.rss'
   
   
   0,10,20,30,40,50 * * * * cd /Users/RedApple/S && script/runner -e development 'User.vote'
   

8. Running these commands individually in the terminal works:

   script/runner -e development 'Digest.rss'
   script/runner -e development 'User.vote'
   

9. Now running a local server in development mode, script/server, I don't see any evidence that the code is actually being run. Is there some step that I didn't do? No guides for "Whenever" show anything else than what I have done.