Writing to a serial port.

[Mr E]

HI, I am trying to open a cash drawer connected to a serial port (com1), but I am having no luck trying to open it. here is the data that needs to be sent to the cash drawer, emailed to me from the manufacturer: -

To open the cash drawer, The ESC/POS command is as follows

ESC
 
1B 70 m n1 n2
m=00 01<n1<=n2   
n1<=n2<FF
 
(OR “27,112,0,100,100”  in Decimal)

here is the c# code i'm using to open(kick) it.

byte[] code = { 27, 112, 0, 100, 100 };
 
            using (SerialPort s = new SerialPort())
            {
                s.BaudRate = 9600;
                s.PortName = "com1";
                s.Parity = Parity.None;
                s.DataBits = 8;
                s.StopBits = StopBits.One;
 
                s.Open();
                s.Write(code, 0, code.Length);
                s.Close();
            }

But nothing happens, any idea's what I'm missing?