GSM Module 900A no signal

The gsm module D6 light blinks (5,6 times) and if I call from another number to the gsm based sim, there is no signal. The program that is uploaded has also no error but still, it doesn’t give me any SMS calls or anything but shows everything fine… I can’t understand what is happening. please help me i am a noobster :frowning:
The program that I’ve written is:
#include <SoftwareSerial.h>
SoftwareSerial mySerial(9, 10);
char msg;
char call;

void setup()
{
mySerial.begin(9600); // Setting the baud rate of GSM Module
Serial.begin(9600); // Setting the baud rate of Serial Monitor (Arduino)
Serial.println(“GSM SIM900A BEGIN”);
Serial.println(“Enter character for control option:”);
Serial.println(“h : to disconnect a call”);
Serial.println(“i : to receive a call”);
Serial.println(“s : to send message”);
Serial.println(“c : to make a call”);
Serial.println(“e : to redial”);
Serial.println();
delay(100);
}

void loop()
{
if (Serial.available()>0)
switch(Serial.read())
{
case ‘s’:
SendMessage();
break;
case ‘c’:
MakeCall();
break;
case ‘h’:
HangupCall();
break;
case ‘e’:
RedialCall();
break;
case ‘i’:
ReceiveCall();
break;
}
if (mySerial.available()>0)
Serial.write(mySerial.read());
}

void SendMessage()
{
mySerial.println(“AT+CMGF=1”); //Sets the GSM Module in Text Mode
delay(1000); // Delay of 1000 milli seconds or 1 second
mySerial.println(“AT+CMGS=”+923362575653"\r"); // Replace x with mobile number
delay(1000);
mySerial.println(“sim900a sms”);// The SMS text you want to send
delay(100);
mySerial.println((char)26);// ASCII code of CTRL+Z
delay(1000);
}

void ReceiveMessage()
{
mySerial.println(“AT+CNMI=2,2,0,0,0”); // AT Command to recieve a live SMS
delay(1000);
if (mySerial.available()>0)
{
msg=mySerial.read();
Serial.print(msg);
}
}

void MakeCall()
{
mySerial.println(“ATD+923362575653”); // ATDxxxxxxxxxx; – watch out here for semicolon at the end!!
Serial.println("Calling "); // print response over serial port
delay(1000);
}

void HangupCall()
{
mySerial.println(“ATH”);
Serial.println(“Hangup Call”);
delay(1000);
}

void ReceiveCall()
{
mySerial.println(“ATA”);
delay(1000);
{
call=mySerial.read();
Serial.print(call);
}
}

void RedialCall()
{
mySerial.println(“ATDL”);
Serial.println(“Redialing”);
delay(1000);
}

moni.PNG