NEED HELP FOR 10 DOF Mems IMU can't initialize

Hello there, I need some help on the newly brought 10 DOF Mems IMU Sensor. When I was trying to run the sample code in arduino (Sample.ino), I can upload the program with no problem, but serial monitor shows arduino freeze at the line "  sixDOF.init(); //init the dfrobot and Gyro ", if I delete this line, the code runs fine and constantly display changing values with or without the sensor attached, which makes me think those values didn't come from the sensor itself. Is my sensor broken? Or is it coding problem?

on the sensor board, a red light LED is on when I connected to arduino
my arduino type is leonardo
OS: win7

here is the samlpe code I used:

//The 10 Dof sample sketch for reading the BMP085 and IMUs raw data

#include <Wire.h>
#include <FreeSixIMU.h>
#include <FIMU_ADXL345.h>
#include <FIMU_ITG3200.h>
#include <HMC5883L.h>
#include <BMP085.h>

float angles[3]; // yaw pitch roll
float heading;
BMP085 dps = BMP085();
long Temperature = 0, Pressure = 0, Altitude = 0;

// Set the FreeSixIMU object
FreeSixIMU sixDOF = FreeSixIMU();

HMC5883L compass;
// Record any errors that may occur in the compass.
int error = 0;

void setup(){

  Serial.begin(9600);
  Wire.begin();
  delay(1000);
  dps.init();
  dps.dumpCalData();
  delay(5000);
 
  delay(5);

[color=red]  Serial.print(" before sixDOF "); // I added this line myself[/color]

  sixDOF.init(); //init the dfrobot and Gyro

[color=red]  Serial.print(" after sixDOF "); // I added this line myself, program never goes here[/color]

  delay(5);
  compass = HMC5883L(); // init HMC5883
 
  error = compass.SetScale(1.3); // Set the scale of the compass.
  error = compass.SetMeasurementMode(Measurement_Continuous); // Set the measurement mode to Continuous 
  if(error != 0) // If there is an error, print it out.
    Serial.println(compass.GetErrorText(error));

}

void loop(){
  dps.getTemperature(&Temperature);
  dps.getPressure(&Pressure);
  dps.getAltitude(&Altitude);
 
  sixDOF.getEuler(angles);

  getHeading();
  PrintData();
 
  delay(300);
}

void getHeading(){
  // Retrive the raw values from the compass (not scaled).
  MagnetometerRaw raw = compass.ReadRawAxis();
  // Retrived the scaled values from the compass (scaled to the configured scale).
  MagnetometerScaled scaled = compass.ReadScaledAxis();
 
  // Values are accessed like so:
  int MilliGauss_OnThe_XAxis = scaled.XAxis;// (or YAxis, or ZAxis)

  // Calculate heading when the magnetometer is level, then correct for signs of axis.
  heading = atan2(scaled.YAxis, scaled.XAxis); 
 
  float declinationAngle = 0.0457;
  heading += declinationAngle;
 
  // Correct for when signs are reversed.
  if(heading < 0)
    heading += 2*PI;
   
  // Check for wrap due to addition of declination.
  if(heading > 2*PI)
    heading -= 2*PI;
 
  // Convert radians to degrees for readability.
  heading = heading * 180/M_PI;
}

void PrintData(){
 
  Serial.print("Eular Angle: ");
  Serial.print(angles[0]);
  Serial.print("  "); 
  Serial.print(angles[1]);
  Serial.print("  ");
  Serial.print(angles[2]);
  Serial.print("  ");
  Serial.print("Heading: ");
  Serial.print(heading);
  Serial.print("  ");
  Serial.print("Temperature: ");
  Serial.print(Temperature);
  Serial.print("C");
  Serial.print("  ");
  Serial.print("Altitude: ");
  Serial.print(Altitude);
  Serial.print("cm");
  Serial.print("  ");
  Serial.print("Pressure: ");
  Serial.print(Pressure);
  Serial.println(" Pa");
}