GPS Tracker from DFROBOT GSM/GPS module

I seek help for my project. After several modules I selected this dfrobot module to make my gps tracking project. I refer http://www.dfrobot.com/wiki/index.php/G ... KU:TEL0051)#How_to_drive_the_GSM_Mode_via_Arduino_board. As my first step I'am trying to send a sms to a mobile phone using this module and Arduino UNO. I did everything according to above website. Specially this code,
// Product name: GPS/GPRS/GSM Module V3.0
// # Product SKU : TEL0051
// # Version : 0.1

// # Description:
// # The sketch for driving the gsm mode via the Arduino board

// # Steps:
// # 1. Turn the S1 switch to the Prog(right side)
// # 2. Turn the S2 switch to the Arduino side(left side)
// # 3. Set the UART select switch to middle one.
// # 4. Upload the sketch to the Arduino board
// # 5. Turn the S1 switch to the comm(left side)
// # 6. RST the board

// # wiki link- http://www.dfrobot.com/wiki/index.php/G ... KU:TEL0051)

byte gsmDriverPin[3] = {
3,4,5};//The default digital driver pins for the GSM and GPS mode
//If you want to change the digital driver pins
//or you have a conflict with D3~D5 on Arduino board,
//you can remove the J10~J12 jumpers to reconnect other driver pins for the module!
void setup()
{
//Init the driver pins for GSM function
for(int i = 0 ; i < 3; i++){
pinMode(gsmDriverPin[i],OUTPUT);
}
digitalWrite(5,HIGH);//Output GSM Timing
delay(1500);
digitalWrite(5,LOW);
digitalWrite(3,LOW);//Enable the GSM mode
digitalWrite(4,HIGH);//Disable the GPS mode
delay(2000);
Serial.begin(9600); //set the baud rate
delay(5000);//call ready
delay(5000);
delay(5000);
}

void loop()
{
Serial.println("AT"); //Send AT command
delay(2000);
Serial.println("AT");
delay(2000);
//Send message
Serial.println("AT+CMGF=1");
delay(1000);
Serial.println("AT+CMGS=\"15800449871\"");//Change the receiver phone number
delay(1000);
Serial.print("HELLO");//the message you want to send
delay(1000);
Serial.write(26);
while(1);
}

But there is no sms received by mobile phone. Also I'm tired of searching and testing codes. So can anyone help me to do my project.
Thank You