X-bee S2 communicates in X-ctu but not in ARDUINO?

I configured my X-BEE S2 as co-ordinator AT and the other one as ROUTER AT, they are very much fine, while talking in X-CTU terminals. Now the real problem comes when i plug it into arduino boards each, co-ordinator is transmitting the signal and router is not receiving it, my code, is very much simple

transmitter code

void setup()
{
Serial.begin(9600);
}

void loop()
{
Serial.println(“HI World”);
delay(1000);
}

receiver code

void setup()
{
Serial.begin(9600);
}

void loop()
{
if(Serial.available() > 0)
{
Serial.write(Serial.read());
}
}

Try issuing a Global network reset (ATNR1) on your router.

Yeah, I did, but was of no avail.

Restore both radios to defaults using the ATRE command on each of them. Then while the router is powered off, issue an ATNR0 on the Coordinator. Power on the router and issue a local network reset using the ATNR0 command. Once reset, the router should rejoin the coordinator allowing communications to occur.