Problem when Due receives datas from serial port

Official Hardware Mega Due
2

Due88:

String inputString = "";         // a string to hold incoming data

boolean stringComplete = false;  // whether the string is complete

void setup() {
 // initialize serial:
 Serial.begin(9600);
 Serial1.begin(9600);
 // reserve 200 bytes for the inputString:
 inputString.reserve(200);
}

void loop() {
 // print the string when a newline arrives:
Serial1.print("REQUESTDATA\r");
delay(1000);
 if (stringComplete) {
   Serial.print(inputString);
   // clear the string:
   inputString = "";
   stringComplete = false;
 }
}

Is that snippet code? The example sketch from File->Examples->04.Communication->serialEvent comes with the serialEvent function in it. I don't see it in yours.

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