druby://localhost:8400 - #<Errno::ECONNREFUSED: Connection refused - connect(2)> (DRb::DRbConnError)

/usr/local/lib/ruby/1.8/drb/drb.rb:736:in `open'
/usr/local/lib/ruby/1.8/drb/drb.rb:729:in `each'
/usr/local/lib/ruby/1.8/drb/drb.rb:729:in `open'
/usr/local/lib/ruby/1.8/drb/drb.rb:1191:in `initialize'
/usr/local/lib/ruby/1.8/drb/drb.rb:1171:in `new'
/usr/local/lib/ruby/1.8/drb/drb.rb:1171:in `open'
/usr/local/lib/ruby/1.8/drb/drb.rb:1087:in `method_missing'
/usr/local/lib/ruby/1.8/drb/drb.rb:1105:in `with_friend'
/usr/local/lib/ruby/1.8/drb/drb.rb:1086:in `method_missing'
index.rb:16