ActiveMessaging Error Dispatch exception

michalkurek@nil ~/rails/messge_monster  $ ./script/about 
Ruby version              1.8.6 (i686-darwin9.8.0)
RubyGems version          1.3.5
Rack version              1.0
Rails version             2.3.4
Active Record version     2.3.4
Active Resource version   2.3.4
Action Mailer version     2.3.4
Active Support version    2.3.4
Environment               development
Database adapter          mysql

Error: 

michalkurek@nil ~/rails/messge_monster  $ ./script/poller run
ActiveMessaging: Loading /Users/michalkurek/rails/messge_monster/app/processors/application.rb
ActiveMessaging: Loading /Users/michalkurek/rails/messge_monster/app/processors/hello_world_processor.rb
=> Subscribing to /queue/HelloWorld (processed by HelloWorldProcessor)
Dispatch exception: undefined method `prepare_application_for_dispatch' for ActionController::Dispatcher:Class
/usr/local/lib/ruby/gems/1.8/gems/activemessaging-0.6.1/lib/activemessaging/gateway.rb:192:in `prepare_application'
	/usr/local/lib/ruby/gems/1.8/gems/activemessaging-0.6.1/lib/activemessaging/gateway.rb:205:in `dispatch'
	/usr/local/lib/ruby/gems/1.8/gems/activemessaging-0.6.1/lib/activemessaging/gateway.rb:203:in `synchronize'
	/usr/local/lib/ruby/gems/1.8/gems/activemessaging-0.6.1/lib/activemessaging/gateway.rb:203:in `dispatch'
	/usr/local/lib/ruby/gems/1.8/gems/activemessaging-0.6.1/lib/activemessaging/gateway.rb:45:in `start'
	/usr/local/lib/ruby/gems/1.8/gems/activemessaging-0.6.1/lib/activemessaging/gateway.rb:32:in `start'
	/usr/local/lib/ruby/gems/1.8/gems/activemessaging-0.6.1/lib/activemessaging/gateway.rb:31:in `each'
	/usr/local/lib/ruby/gems/1.8/gems/activemessaging-0.6.1/lib/activemessaging/gateway.rb:31:in `start'
	/usr/local/lib/ruby/gems/1.8/gems/activemessaging-0.6.1/lib/activemessaging.rb:114:in `start'
	/Users/michalkurek/rails/messge_monster/lib/poller.rb:25
	/usr/local/lib/ruby/gems/1.8/gems/activesupport-2.3.4/lib/active_support/dependencies.rb:145:in `load_without_new_constant_marking'
	/usr/local/lib/ruby/gems/1.8/gems/activesupport-2.3.4/lib/active_support/dependencies.rb:145:in `load'
	/usr/local/lib/ruby/gems/1.8/gems/activesupport-2.3.4/lib/active_support/dependencies.rb:521:in `new_constants_in'
	/usr/local/lib/ruby/gems/1.8/gems/activesupport-2.3.4/lib/active_support/dependencies.rb:145:in `load'
	/usr/local/lib/ruby/gems/1.8/gems/daemons-1.0.10/lib/daemons/application.rb:176:in `start_load'
	/usr/local/lib/ruby/gems/1.8/gems/daemons-1.0.10/lib/daemons/application.rb:253:in `start'
	/usr/local/lib/ruby/gems/1.8/gems/daemons-1.0.10/lib/daemons/controller.rb:72:in `run'
	/usr/local/lib/ruby/gems/1.8/gems/daemons-1.0.10/lib/daemons.rb:139:in `run'
	/usr/local/lib/ruby/gems/1.8/gems/daemons-1.0.10/lib/daemons/cmdline.rb:105:in `call'
	/usr/local/lib/ruby/gems/1.8/gems/daemons-1.0.10/lib/daemons/cmdline.rb:105:in `catch_exceptions'
	/usr/local/lib/ruby/gems/1.8/gems/daemons-1.0.10/lib/daemons.rb:138:in `run'
	./script/poller:25
^C
<<Interrupt received>>

Solution:

Create initializer for active_messaging contain:

# file config/initializers/active_messaging.rb
module ActiveMessaging
  mattr_accessor :cache_classes

  self.cache_classes = true

  class Gateway
    def self.prepare_application
      Dispatcher.prepare_application_for_dispatch unless ActiveMessaging.cache_classes
    end

    def self.reset_application
      Dispatcher.reset_application_after_dispatch unless ActiveMessaging.cache_classes
    end
  end
end