Xbee Zigbee sending to itself

Hello, I have a problem. I have bought 2 Xbee Zigbees. The one Zigbee is set as Coordinator. The other Zigbee is set as Router. I can send messages from Router to the Coordinator. But when I want to send messages from Coordinator to the Router it sends them to itself. I haven’t written any code, I am doing this through X-CTU.What is wrong?

If you don’t show what you sent to it, and also very important: what it returns afterwards, then the assumption that we are psychic is what is wrong.

Xbee Zigbees would be Digi’s Xbee Series 2 radios, not Series 1, right?