Thank you very much for answering!
The option selects the remote device, it appears disabled, I think this model is not possible.
Then I go to: Remote selection and select: 16 bit address. (the only option in which it shows me error).
Enter the MAC of xbee B which is: EC2B and select loopback.
Pulse in start range test and the xbee A sends packets but receives none.
Previously I have configured the two xbee in transparent peer to peer and each with the address of the other in destination address.
the loopback grove of the xbe B is with the jumper in loopback.
I need to do?