ruby: websocket server and websocket client can't work

I am a really newbie for this.but, I can't figure out what's wrong with this problem.

I just copied from somewhere online about a ruby websocket server and a ruby websocket client implementation. I had also installed ruby 1.93 on my windows xp. all looked fine but the websocket client doesn't really work well.

server side code:

equire 'em-websocket'
 
 EventMachine::WebSocket.start(:host => "0.0.0.0", :port => 8080) do |ws|
   ws.onopen    { ws.send "Hello Client!"}
   ws.onmessage { |msg| ws.send "Pong: #{msg}" }
   ws.onclose   { puts "WebSocket closed" }
 end
 

Client side code:

require 'eventmachine'
 require 'em-http-request'
 
 EventMachine.run {
   http = EventMachine::HttpRequest.new("ws://localhost:8080").get :timeout => 0
   http.errback { puts "oops" }
   http.callback {
       puts "WebSocket connected!"
       http.send("Hello client")
   }
 
   http.stream { |msg|
       puts "Recieved: #{msg}"
       http.send "Pong: #{msg}"
   }
 }
 

the client side always spin out "oops" . that means there's is an error happened.

Could anybody give me any clue for this? I appreciate.

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