TTL RX TX able to send data but can't read from servo motor ; arduino

i am using http://robokits.co.in/shop/index.php?main_page=product_info&cPath=2&products_id=368 this motor in my project .
when i am writing data to motor using arduino via tx and rx … it is responding to data character like “R1212” … but while i am trying to read the value from motor … i am not able to get anything …
please help me … i am stuck in my project work

void setup()
{
Serial.begin(9600);
Serial.println(“Y”); // to reset the values of servo motor
Serial.println(“R1212”); // go to this relative angle … ( and it worked )

// here is the problem while reading from motor .

Serial.println(“R”); // comman byte to be read

if(Serial.available()){
int c = Serial.read();
Serial.println(c);
}

}
void loop()
{

}

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