IRS4 and only 1 port?

From what I remember in class, AXLink devices have only 1 port: 1. How do I specify which IR (port) to use on an AXB-IRS4? I tried mapping my IR file to different ports (dvDVD = 129:3:0, dvSAT = 129:2:0) and transferring the IR file to port 3(which took, btw), but everything from the DVD seems to emit from port 1. (The #1 LED on the IRS4.)

Do I need to do something different for an IRS4 when it comes to the command structure?

I have tried this:

Button_Event[dvTP,1]
Button_Event[dvTP,2]
Button_Event[dvTP,3]
Button_Event[dvTP,4]
Button_Event[dvTP,5]
{
    PUSH:
    {
         PULSE[dvDVD,BUTTON.INPUT.CHANNEL]
    }
}

which emitted from IR port 1.

I also tried this:

BUTTON_EVENT[dvTp,1]
{
	PUSH:
	{
		SEND_COMMAND dvDVD, "'SP',(BUTTON.INPUT.CHANNEL)"
	}
}

but that didn't do anything.