Arduino Leonardo troubles reading from Serial1

Using Arduino Programming Questions
14

Tried, still doesn't work here is my sketch:

int incomingByte = 0;

void setup(){ 
  Serial1.begin(57600);
  Serial.begin(57600);
  while (!Serial1) {  }
}

void loop()
{
  //Serial1.println(100,DEC);
    // send data only when you receive data:
    while (Serial1.available()) {
      Serial.print("Available");
      if (Serial1.available() > 0) {
              // read the incoming byte:
              incomingByte = Serial1.read();
              // say what you got:
              Serial.print("I received: ");
              Serial.println(incomingByte, DEC);
      }
    }
}