Cannot Access a disposed object System.Net.Sockets.NetworkStream

 FtpWebRequest req = (FtpWebRequest)WebRequest.Create(new Uri(FTPManifestFile));
            req.Credentials = new NetworkCredential(uID, pswrd);
            //req.Timeout = Timeout.Infinite;
            req.UseBinary = true;
            req.Proxy = null;
            req.KeepAlive = false;
            req.UsePassive = false;
            FtpWebResponse res = (FtpWebResponse)req.GetResponse();
            Stream tmpStream = res.GetResponseStream();
            TextReader tmpReader = new StreamReader(tmpStream);
            
            XmlDocument newDoc = new XmlDocument();
            newDoc.Load(tmpReader); // EXCEPTION FOUND HERE  :(
            XmlNamespaceManager nsmgr1 = new XmlNamespaceManager(newDoc.NameTable);