关于asp.net与delphi应用程序通信的问题，困扰好几天了，请高手解决！

我在我机子上用asp.net做了一个web程序，想用它和其他机子上delphi应用程序通信，web程序是客户端，那个是服务端。
用tcpclient,连接没有问题，连接好服务器后 web程序用一个线程执行一个死循环来检查networkstream中的数据，可就是在tbJieshou框中显示不出来，下面是代码请指教

public partial class _Default : System.Web.UI.Page
{
    static TcpClient client;
    private static NetworkStream stream;
    Thread t ;
    protected void Page_Load(object sender, EventArgs e)
    {

    }
    //连接前置机
    protected void btnConnect_Click(object sender, EventArgs e)
    {
        client = new TcpClient(tbIP.Text, Convert.ToInt32(tbPort.Text));
        if (!client.Connected)
        {
            Response.Write("<script language='javascript'>alert('连接前置机失败！')</script>");
        }
        else
        {
            stream = client.GetStream();
            Response.Write("<script language=javascript>alert('连接成功！')</script>");
        }

        //IPAddress ip = IPAddress.Parse(tbIP.Text);
        //listener = new TcpListener(ip, Convert.ToInt32("2960"));
        //listener.Start();
        t = new Thread(new ThreadStart(receiveInfo));
        t.Start();

    }
    //发送数据
    protected void btnSend_Click(object sender, EventArgs e)
    {
        string info = tbSend.Text.Trim();
        byte[] bytes = System.Text.Encoding.Default.GetBytes(info);
        stream.Write(bytes, 0, bytes.Length);
    }
    //关闭连接
    protected void btnUnConnect_Click(object sender, EventArgs e)
    {
        client.Close();
        Response.Write("<script language=javascript>alert('关闭连接！')</script>");
    }
    //接收数据的函数
    private void receiveInfo()
    {
        int len;
        byte[] bytes = new byte[1024];
        string msg;
        bool flag=true;
        while (flag)
        {
            //bool b = ns.DataAvailable;
            //if (b)
            //{
            len = stream.Read(bytes, 0, bytes.Length);


            msg = System.Text.Encoding.Default.GetString(bytes, 0, len);


            fuzhi(msg);

         }

    }
    private void fuzhi(string msg)
    {
        tbJieshou.Text = msg;
        //client.Close();
    }
    }

补充：.NET技术 ,  ASP.NET