httpwebrequest登陆的问题~~~~~

都老问题了 可是我还是不明白~~~始终没成功~~~~~~ 用了很多种方法 没解决~~~~希望你们帮我下~~ 谢谢了~~~~
        string strId = TextBox1.Text;
        string strPassword = TextBox2.Text;        ASCIIEncoding encoding = new ASCIIEncoding();
        string postData = "?refurl=http://www.livecq.cn/bbs/index.aspx&name=" + strId;
        postData += ("&password=" + strPassword + "&savedays=-1");
        
        byte[] data = encoding.GetBytes(postData);        // Prepare web request...   
        HttpWebRequest myRequest =
        (HttpWebRequest)WebRequest.Create("http://www.livecq.cn/bbs/user_login.aspx");        myRequest.Method = "POST";
        myRequest.ContentType = "application/x-www-form-urlencoded";
        myRequest.ContentLength = data.Length;
        Stream newStream = myRequest.GetRequestStream();        // Send the data.   
        newStream.Write(data, 0, data.Length);
        newStream.Close();        // Get response   
        HttpWebResponse myResponse = (HttpWebResponse)myRequest.GetResponse();
        StreamReader reader = new StreamReader(myResponse.GetResponseStream(), Encoding.Default);
        string content = reader.ReadToEnd();
        Console.WriteLine(content);