mpd_demo.rb

[lubino]

I am trying to run
ruby mpd_demo.rb

It ends with this result
/var/lib/gems/2.1.0/gems/ruby-mpd-0.3.1/lib/ruby-mpd.rb:144:in 'initialize': Connection refused - connect(2) for "localhost" port 6600 (Errno::ECONNREFUSED)
from /var/lib/gems/2.1.0/gems/ruby-mpd-0.3.1/lib/ruby-mpd.rb:144:in 'new'
from /var/lib/gems/2.1.0/gems/ruby-mpd-0.3.1/lib/ruby-mpd.rb:144:in 'connect'
from mpd_demo.rb:142:in 'block in < main >'
from /var/lib/gems/2.1.0/gems/eventmachine-1.0.3/lib/eventmachine.rb:187:in 'call'
from /var/lib/gems/2.1.0/gems/eventmachine-1.0.3/lib/eventmachine.rb:187:in 'run_machine'
from /var/lib/gems/2.1.0/gems/eventmachine-1.0.3/lib/eventmachine.rb:187:in 'run'
from mpd_demo.rb:140:in '< main >'

What is wrong with my configuration?
Thanks a lot.

[lubino]

Also ruby web_ui.rb

web_ui.rb:18:in 'class:WebSocketUI': uninitialized constant WebSocketUI::MPDOperations (NameError)
from web_ui.rb:17:in '< main >'