I'm writing a simple bluetooth application for sending a data from my Samsung Omnia 2 to my laptop. I'm experimenting first by sending a simple Hello message but am getting this error.

Socket Exception

No connection could be made because the target computer actively refused it.

I know its a relatively common issue so can someone here who's experience help me with it? I am shamefully a beginner to programming so I don't thing I can solve this on my own.

My code. Which you will notice is mostly butchered from the original sample code.

Samsung Omnia 2 Side : Supposedly searches for the device when I click the button, then sends a single hello to the stream.

private void btnConnect_Click(object sender, EventArgs e)
        {
            
            {
                SelectBluetoothDeviceDialog dlg = new SelectBluetoothDeviceDialog();
                DialogResult result = dlg.ShowDialog();
                if (result != DialogResult.OK)
                {
                    return;
                }
                BluetoothDeviceInfo device = dlg.SelectedDevice;
                BluetoothAddress addr = device.DeviceAddress;

                BluetoothEndPoint ep = new BluetoothEndPoint(addr, ServiceName);
                BluetoothClient cli = new BluetoothClient();

                cli.Connect(ep);

                Stream peerStream = cli.GetStream();

                byte[ buffer = new byte[255];
                buffer = System.Text.ASCIIEncoding.ASCII.GetBytes("Hello");

                peerStream.Write(buffer, 0, buffer.Length);

            }

Laptop side. Just waits to receive the message.

private void timer1_Tick(object sender, EventArgs e)
       {
            int bytesRead;
            BluetoothClient client = null;
            BluetoothListener lis = new BluetoothListener(ServiceName);
            lis.Start();
            string text;
            Stream peerstream = null;
            byte[ Buffer = null;

            try
            {
                client = lis.AcceptBluetoothClient();
                //  blocking call
                peerstream = client.GetStream();
                bytesRead = peerstream.Read(Buffer, 0, 100);
                textBox1.Text = System.Text.ASCIIEncoding.ASCII.GetString(Buffer,0,bytesRead);

            }
            catch (Exception)
            {
                       MessageBox.Show("Error listening to incoming message");
                
            }

        }

I'm using

Guid ServiceName = new Guid("{00112233-4455-6677-8899-aabbccddeeff}");

Don't know whether you've fixed this already.  The same Service Class Id (UUID/Guid) needs to be used by client and server.