Problem in communicating with XBEE S2?

My question seems to be quite weird, but i have to complete my college project which is due tomorrow?

I am able to communicate using X-CTU terminal between two modules, but when I try to communicate by sending data through arduino board i am not able to do so?

What might be the problem, where will I have to change the code, or setting?

i have to complete my college project which is due tomorrow?

Don't you know if it is?

What might be the problem

Your code, your configuration of the XBees, or how the XBees are connected to the Arduino(s) - all of which you failed to describe/post.

Thanks for your reply, here is my code

transmitter code

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

void loop()
{
  Serial.println("Hello World");
  delay(5000);
}

Receiver code

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

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

I am using arduino uno on co-ordinator and older atmega 8 board on the router side,

For communicating with x-ctu i have shorted reset to ground. and after programming arduino I take off the shorted wire and try to communicate between two serial monitors which doesn't happen at all. I am really perplexed about what to do next?

Anyways thanks a ton

And for your information, i have configured one xbee s2 as Zigbee Coordinator At, and the other one as router AT, and i have used four wires positive, negative, rx from arduino to tx of xbee, and tx of arduino to rx of xbee

Thanks for your reply, got it working

Problem was while connecting in pair, will have to put ATDH, and ATDL values which i haven't done, after entering the values, it works like a king of wireless,

Thanks again