Serial Monitor is blank, not working

greetings,

I am using the following code on a Teensy 3.1 (Teensyduino) and the Arduino Serial Monitor is not responding. I was wondering if anyone else has had that issue before.

void setup()
{
  Serial.begin(9600); // USB is always 12 Mbit/sec
}

void loop()
{
  Serial.println("Hello World...");
  delay(1000);  // do not print too fast!
}

edit: this was resolved because the default com port was incorrect. COM 4 is the correct serial over usb port for a Teensy 3.1

hope this helps someone later.