Arduino GY273 HMC5883L Constant Value

Question

I have a GY-273 which has HMC5883L chip (I guess). I am trying to get data. I find a few codes and library (I don't have enough information about HMC5883L) but always all serial port screen there are only one value. Here is my sketch:

#include <Wire.h>
#include "compass.h"

#define Task_t 10          // Task Time in milli seconds

int dt=0;
unsigned long t;
// Main code -----------------------------------------------------------------
void setup(){
  Serial.begin(9600);
  // Serial.print("Setting up I2C ........\n");
  Wire.begin();
  compass_x_offset = -48.23;  //122.17;
  compass_y_offset = 284.69;  //230.08;
  compass_z_offset = 59.87;  //389.85;
  compass_x_gainError = 1.07;  //1.12;
  compass_y_gainError = 1.09;  //1.13;
  compass_z_gainError = 1.01;  //1.03;

  compass_init(2);
  //compass_debug = 1;
  //compass_offset_calibration(3);

}

void loop(){

  t = millis();

  float load;

  compass_scalled_reading();

  Serial.print("x = ");
  Serial.println(compass_x_scalled);
  Serial.print("y = ");
  Serial.println(compass_y_scalled);
  Serial.print("z = ");
  Serial.println(compass_z_scalled);

  compass_heading();
  Serial.print ("Heading angle = ");
  Serial.print (bearing);
  Serial.println(" Degree");

  dt = millis()-t;
  load = (float)dt/(Task_t/100);
  Serial.print ("Load on processor = ");
  Serial.print(load);
  Serial.println("%");


  delay(100);
}

And Serial port screen is:

Gain updated to  = 1.22 mG/bit
x = -48.23
y = 284.69
z = 59.87
Heading angle = 99.62 Degree
Load on processor = inf%
x = -48.23
y = 284.69
z = 59.87
Heading angle = 99.62 Degree
Load on processor = inf%
x = -48.23
y = 284.69
z = 59.87
Heading angle = 99.62 Degree
Load on processor = inf%
x = -48.23
y = 284.69
z = 59.87

^{simulate this circuit – Schematic created using CircuitLab}