URM07 (SEN0153): Setting the adress

I am trying to change the adress of these sensors with the next code. After using it, the blue LED in the sensor has not worked again. I would like to know if the sensor is broken or if I can fix it and how. 

// # Pin VCC (URM07 V1.0) -> D3     (Arduino Leonardo)

// # Pin GND (URM07 V1.0) -> D2     (Arduino Leonardo)

// # Pin  RX (URM07 V1.0) -> TX1/D1 (Arduino Leonardo)

// # Pin  TX (URM07 V1.0) -> RX1/D0 (Arduino Leonardo)

#define header_H    0x55 //Header

#define header_L    0xAA //Header

#define device_Addr 0xAB //Address

#define data_Length 0x01 //Data length

#define set_adress_CMD 0x55 //Command: Set adress

#define set_adress  0x05 //Command: Change adress

#define checksum    (header_H+header_L+device_Addr+data_Length+set_adress_CMD+set_adress) //Checksum

unsigned char i=0;

unsigned char Adress=0;

unsigned char Operation_confirmed=0;

unsigned char Rx_DATA[8];

unsigned char CMD[7]={

  header_H,header_L,device_Addr,data_Length,set_adress_CMD,set_adress,checksum}; //Distance command package

void setup() {

  pinMode(2, OUTPUT);

  pinMode(3, OUTPUT);

  digitalWrite(3, HIGH);  //Ultrasonic VCC

  digitalWrite(2, LOW);   //Ultrasonic GND

  Serial1.begin(19200);  //Serial1: Ultrasonic Sensor Communication Serial Port, Buadrate: 19200

  Serial.begin(19200);   //Serial: USB Serial Data output, baudrate: 19200

}

void loop() {

  for(i=0;i<7;i++){

    Serial1.write(CMD[i]);

  }

  delay(150);  //Wait for the result

  i=0;

  while (Serial1.available()){  //Read the return data (Note: this demo is only for the reference, no data verification)

    Rx_DATA[i++]=(Serial1.read());

  }

  Adress=(Rx_DATA[2]);

  Operation_confirmed=(Rx_DATA[5]);  

  if (Operation_confirmed == 0xCC){

    Serial.println("Operation completed");

  }  

  else{

    Serial.println("Operation Failed");

  }

  delay(1000);

  Serial.println(Adress);

}

If you are not sure of its usage, there is a document in which all the data is explained.

Thanks!!