Processing 1.5.1 won't recognize my Arduino Uno at ttyACM0 but the serial monitor with the Arduino IDE will communicate with the Uno via ttyACM0.

The following Processing code used with StandardFirmata_2_2_for_0_3 loaded on the UNO (Arduino 022) will not light the LED I have between pin 11 and GND.

When I run the processing code, LED stops blinking, the available ports are printed and the RX LED lights every 2 seconds.

If I load a sketch to accomplish the same thing directly to the UNO, the LED will light.

I would appreciate help with making this work thru Firmata.

import processing.serial.*;

import cc.arduino.*;

Arduino arduino;

void setup() {
   
  println(Arduino.list());
  arduino = new Arduino(this, Arduino.list()[1], 115200);
 
  arduino.pinMode(11, Arduino.OUTPUT);
}

void draw()
{
  arduino.digitalWrite(11, Arduino.HIGH);
  delay(1000);
  arduino.digitalWrite(11, Arduino.LOW);
  delay(1000);
}