高手请入：为什么太平洋论坛的内容爬不下来？

Question

爬百度、GOOGLE都可以，为什么这个URL不行？
http://softbbs.pconline.com.cn/f592975.html以下是相关代码，高手帮帮忙。
            StringBuilder sb = new StringBuilder("http://softbbs.pconline.com.cn/f592975.html");
            CookieContainer cc = new CookieContainer();
            try
            {
                HttpWebRequest myReq = (HttpWebRequest)WebRequest.Create(sb.ToString());
                myReq.Method = "GET";
                myReq.CookieContainer = cc;
                HttpWebResponse resp = myReq.GetResponse() as HttpWebResponse;
                Stream s = resp.GetResponseStream();
                StreamReader sr = new StreamReader(s,System.Text.Encoding.Default);
                String text = sr.ReadToEnd();
                Console.WriteLine(text);
                sr.Close();
                s.Close();
            }
            catch (Exception ex)
            {
                StreamWriter sw = new StreamWriter(@"d:\url.txt", true);
                string s = ex.ToString();
                sw.WriteLine(s);
                sw.Close();
            }