Rails - Sep 2014 - Ruby rails

I installed Ruby on Rails 1.9.3 version on windows . I built a simple hello
world program , the issue is that when I build it in sublime text 2 I get this
error :"Uninitialized constant ApplicationController ( nameerror) "
and I get the same error when run this program in the command line . My
application_controller.rb look like this :

class ApplicationController < ActionController::Base

end

I installed the gems but I still get this error . I downloaded ruby rails to a
mac and having the same issue.

The program :

class HelloworldsController < ApplicationController
  def hi
    puts "Hello world"
  end
end


Any thoughts pleas ?

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