Sending xml to Twilio in Rails

I'm spiking on a rails app to make calls using twilio. I'm using the twilio gem but when twilio hits my app to get the xml it blows up as there is nothing in the body of the response. It calls my phone but says error in the app.

def index
  Twilio.connect('ac开发者_JS百科count sid', 'auth token')
  Twilio::Call.make('from number', 'to number', 'url')
end

def show
  @verb = Twilio::Verb.new { |v|
    v.say "The time is #{Time.now}"
    v.hangup
  }

  respond_to do |format|
    format.xml {render :xml => verb.response}
  end

end

And here is the error on twilio site.

Response: What your web application responded with to Twilio HTTP Headers:

Key Value

X-Runtime 0.011953

X-Ua-Compatible IE=Edge,chrome=1

Transfer-Encoding chunked

Date Thu, 13 Oct 2011 16:13:21 GMT

Set-Cookie _twilio_session=xxxxxxx; path=/; HttpOnly

Connection close

X-Rack-Cache invalidate, pass

Content-Type text/html; charset=utf-8

Server nginx/0.7.67

Cache-Control no-cache

---

Added ".xml" to the end of the url in the Call.make and it worked.