Remote control keys for applications

Smart TV
1

Hi,

i exécuté this source code in my JavaScript file

      if(keyEvent.keyCode === keyCode.KEY_DOWN) { 
                // this  keyEvent.keyCode is  working === 40
	        console.log("The CHANNEL DOWN was good", keyEvent.keyCode);

             // but remote contrôle here dosn't work and not goes down  
	        tizen.tvinputdevice.registerKey("KEY_DOWN");
       }

Best regards,