getting an error "A connection attempt failed because the connection party did not responded"

See more:

C#

.NET

WinForms

C#4.0

.NET4.5

Hi,

I am getting a connection for my socket programming code...
This is just a part of an application, which I am developing...

It takes some data from use and stores into database, but this is not executing... :(

client side ip address- 172.21.5.1; port = 5555;
client side ip address- 172.21.5.2; port = 5555;

client side code...

endpint = new IPEndPoint(IPAddress.Parse(clientip), port);

            serverendpoint = new IPEndPoint(IPAddress.Parse(serverip), serverport);

            ASCIIEncoding asc = new ASCIIEncoding();

            Client = new TcpClient();
            clientsocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);

            try
            {
                Client.Connect(serverendpoint);

                NetworkStream servernetstrm = Client.GetStream();

                servernetstrm.Write(buffer_name, 0, buffer_name.Length);
                servernetstrm.Write(buffer_desc, 0, buffer_desc.Length);
                servernetstrm.Write(buffer_strtdate, 0, buffer_strtdate.Length);
                servernetstrm.Write(buffer_endate, 0, buffer_endate.Length);
             
                servernetstrm.Flush();

            }

            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
            }

            Client.Close()
}

server side code...

clientendpoint = new IPEndPoint(IPAddress.Parse(clientip),port);

            try
            {
                client = default(TcpClient);
                server = new TcpListener(clientendpoint);
                               
                serversocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
                serverstream = new NetworkStream(serversocket);

                serverstream = client.GetStream();

                ASCIIEncoding asc = new ASCIIEncoding();

                serversocket.Bind(clientendpoint);
                serversocket.Listen(1000);
                client = server.AcceptTcpClient();

                server.Start();

                while (true)
                {                 
                    //worker wrk = new worker();
                    //wrk.startClient(client);

                    //get client data...
                    taskname = asc.GetString(buffer_name);
                    task_desc = asc.GetString(buffer_desc);
                    task_start_date = asc.GetString(buffer_strtdate);
                    task_endate = asc.GetString(buffer_endate);

                    SqlCommand cmd = new SqlCommand("insert into accounts ([task name],[task descp],[task start date],[task end date]) Values('"+taskname+"','"+task_desc+"','"+task_start_date+"','"+task_endate+"')", empdata);
                    
                    empdata.Open();
                    int res =  cmd.ExecuteNonQuery();
                    empdata.Close();

                    if (res == 1)
                    {
                        MessageBox.Show("New Task created Successfully");
                    }

                    server.Stop();
                }              
            }

            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
            }

I am getting this error

"A connection attempt failed because the connection party did not responded over a period of time or establieshed connection failed because......."

THE CLIENT AND SERVER ARE RUNNING ON SAME SYSTEM....

Could anyone please help me with this issue ?

Thanks in advance... :)