HttpWebRequest/Response Exception

[techtalk7]

Hi, Im trying to build an app that retrieves real-time fx quotes.

Im getting an exception "cannot access a disposed object" when I try to make a 2nd call to GetResponse() even though I am disposing off it through using statements (I've tried to call Close() manually; this did not solve problem).

static void Main(string[] args)
        {
            string sessionID = "xxxxxx";
            
            HttpWebRequest rateRequest = HttpWebRequest.Create(string.Format(@"http://webrates.truefx.com/rates/connect.html?id={0}", sessionID)) as HttpWebRequest;
            HttpWebResponse rateResponse;
    
                while (true)
                {
                    using (rateResponse = rateRequest.GetResponse() as HttpWebResponse)
                    {
                        if (rateResponse != null)
                        {
                             using (StreamReader rateReader = new StreamReader(rateResponse.GetResponseStream()) )
                             {
                                 Console.WriteLine(rateReader.ReadToEnd());
                             }
                        }
                    }
                }
            }

Would really appreciate some help!