Problem in Thread

[Atif Khan]

I am working on messenger.On each client side there is an interface that listens the new user request and opens a new window for chatting.But when i use to show the application halts i am writing the code if some one know the solution please Let me know.

Thread thread=new Thread(new ThreadStart(reciveConnection));
thread.Start();
Socket sock;

public void reciveConnection()
            {
                TcpListener tcp=new TcpListener(4600);
                tcp.Start();
                While(true)
                      {
           sock=tcp.AcceptSocket();
           Client cli=new Client();/////Initiating object for new clent window
           cli.Show();/////Here problem Accours.
                      }
            }