Ruby/Juggernaut error - Errno::ECONNREFUSED (Connection refused...)

I'm playing around with https://github.com/elii/Cappuccino-X-Juggernaut, which is basically a juggernaut chat for rails, and I get the following errors when I try to submit a post. Could someone tell me where this error is coming from?

Please tell me which files I should post so that someone can diagnose this error.

Processing JuggernautController#send_message (for ::1 at 2011-07-30 16:19:47) [GET]
  Parameters: {"sender"=>"w", "message"=>"hello"}

Errno:开发者_StackOverflow社区:ECONNREFUSED (Connection refused - connect(2)):
  app/controllers/juggernaut_controller.rb:10:in `send_message'
  <internal:prelude>:10:in `synchronize'
  /Users/fred/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/webrick/httpserver.rb:111:in `service'
  /Users/fred/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/webrick/httpserver.rb:70:in `run'
  /Users/fred/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/webrick/server.rb:183:in `block in start_thread'

Rendered rescues/_trace (52.2ms)
Rendered rescues/_request_and_response (0.4ms)
Rendering rescues/layout (internal_server_error)

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It looks like your juggernaut server isn't running? I would install (if not already) and run it as a daemon or separate screen.

More info on juggernaut