diff --git a/Demo.WindowsForms/Source/Program.cs b/Demo.WindowsForms/Source/Program.cs
--- a/Demo.WindowsForms/Source/Program.cs
+++ b/Demo.WindowsForms/Source/Program.cs
@@ -20,7 +20,7 @@ namespace Demo.WindowsForms
       /// </summary>
       /// 
        // Instantiate the communications port 
-       private SerialPort port = new SerialPort("COM1", 9600, Parity.None, 8, StopBits.One);
+       private SerialPort port = new SerialPort("COM5", 9600, Parity.None, 8, StopBits.One);
        static MainForm windowGUI;
 
       [STAThread]