Coordinator Xbee won't recive data from Router Xbee.

So me and my friend is working on a project where we're going to connect two arduinos together with xbee's and send and recive data from a keypad. We've connected the two xbee's with X-CTU and made them communicate and it worked fine. But when we tried to send and recive data from arduino we didn't recive anything.

The code we're using for the arduino is this
For the sender(router);

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

void loop()
{
Serial.println("Hello");
delay(1000)
}

For the reciver(coordinator);

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

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

This is just for testing if we were able to recive anything, but nothing.
And I would assume if we could get communication in X-CTU it would be good to go for the arduino?
I can also add the setup for our xbee's if that would help