Xbee have 4 pins GND (blue), 5V(red), Dout(green), Din(yellow)
And do the two test, TX - Din & RX - Dout and TX - Dout & RX - Din.
I dont have any results.
And I tested If the program really upload in the ATmega328 and yes because, befores this I uploading a Blinking sketch and works.