Streaming does not work about cramp HOT 8 OPEN

local ~$ curl -N -v http://127.0.0.1:3000
* About to connect() to 127.0.0.1 port 3000 (#0)
*   Trying 127.0.0.1... connected
* Connected to 127.0.0.1 (127.0.0.1) port 3000 (#0)
> GET / HTTP/1.1
> User-Agent: curl/7.21.0 (x86_64-pc-linux-gnu) libcurl/7.21.0 OpenSSL/0.9.8o zlib/1.2.3.4 libidn/1.18
> Host: 127.0.0.1:3000
> Accept: */*
> 
< HTTP/1.1 200 OK
< Content-Type: text/html
< Connection: keep-alive
< Server: thin 1.2.11 codename Bat-Shit Crazy
* no chunk, no close, no size. Assume close to signal end
< 
Hello Worldfoo* Closing connection #0

local ~$ curl -v http://stream.twitter.com/1/statuses/sample.json -umyuser:mypass
* About to connect() to stream.twitter.com port 80 (#0)
*   Trying 199.59.148.138... connected
* Connected to stream.twitter.com (199.59.148.138) port 80 (#0)
* Server auth using Basic with user '_lennart'
> GET /1/statuses/sample.json HTTP/1.1
> Authorization: [REMOVED]
> User-Agent: curl/7.21.0 (x86_64-pc-linux-gnu) libcurl/7.21.0 OpenSSL/0.9.8o zlib/1.2.3.4 libidn/1.18
> Host: stream.twitter.com
> Accept: */*
> 
< HTTP/1.1 200 OK
< Content-Type: application/json
< Transfer-Encoding: chunked
< Server: Jetty(6.1.25)
< 
{"in_reply_to_screen_name":null,"text":"What's for breakfast tho?","in_reply_to_user_id_str":null,
....

# hello_world.ru
require "rubygems"
require 'cramp'

class HomeAction < Cramp::Action

  def start
    render "Hello World"
    EventMachine::add_timer(5) do
      render "foo"
      finish
    end
  end
end

run HomeAction