Sim300 enable to read message with ardiuno

hi
help me plz
i cant able to read message with ardiuno 328
i m use sim300
i send sms to another number
and call to another number
but i m not read message when i send to another number


char data[256];
int x;
void setup(){

Serial.begin(115200); // UART baud rate
delay(2000);

// switches the module ON

for (int i=0;i < 5;i++){
delay(5000);
}

Serial.println("AT+CMGF=1"); // sets the SMS mode to text
delay(1000);
}

void loop(){


Serial.println("AT+CMGR=1"); //Reads the first SMS
Serial.flush();
for ( x=0;x < 255;x++){
data[x]='\0';
}
x=0;
do{
while(Serial.available()==0);
data[x]=Serial.read();
x++;
if(data[x-1]==0x0D&&data[x-2]=='"'){
x=0;
}
}while(!(data[x-1]=='K'&&data[x-2]=='O'));

data[x-3]='\0'; //finish the string before the OK

Serial.println(data); //shows the message

delay(5000);

}
i use this code but i dont get my message
serial monitor show nothing