kmarsh@storage_a:~/tmp/amqp-0.6.0$ ruby examples/mq/simple-ack.rb
/usr/lib/ruby/gems/1.8/gems/eventmachine-0.12.10/lib/em/connection.rb:39:in `new': undefined method `associate_callback_target' for #<#<Class:0x838e3cc>:0x838e2f0> (NoMethodError)
        from /usr/lib/ruby/gems/1.8/gems/eventmachine-0.12.10/lib/em/connection.rb:36:in `instance_eval'
        from /usr/lib/ruby/gems/1.8/gems/eventmachine-0.12.10/lib/em/connection.rb:36:in `new'
        from /usr/lib/ruby/gems/1.8/gems/eventmachine-0.12.10/lib/eventmachine.rb:720:in `bind_connect'
        from /usr/lib/ruby/gems/1.8/gems/eventmachine-0.12.10/lib/eventmachine.rb:692:in `connect'
        from /export/home/kmarsh/tmp/amqp-0.6.0/lib/amqp/client.rb:177:in `connect'
        from /export/home/kmarsh/tmp/amqp-0.6.0/lib/amqp.rb:23:in `connect'
        from /export/home/kmarsh/tmp/amqp-0.6.0/lib/amqp.rb:82:in `start'
        from /export/home/kmarsh/tmp/amqp-0.6.0/lib/ext/em.rb:17:in `call'
         ... 15 levels...
        from /usr/lib/ruby/gems/1.8/gems/eventmachine-0.12.10/lib/pr_eventmachine.rb:318:in `run'
        from /usr/lib/ruby/gems/1.8/gems/eventmachine-0.12.10/lib/pr_eventmachine.rb:64:in `run_machine'
        from /export/home/kmarsh/tmp/amqp-0.6.0/lib/ext/em.rb:26:in `run'
        from examples/mq/simple-ack.rb:10