Xbee pro 900hp connection with mission planner

Hello , Please Help!!!!!!!!!!

I am trying to connect xbee xb24 with mission planner. I succesfully configure the two radios via xctu soft , and the two radios are communicate perfectly. After that i open the mission planner and check that i have the same comport , same baud rate and from initial setup /3dr radio page push the ''Load settings'' button after some wait i receive '' Failed to ener command mode''. If i try to connect with the radio on the apm2.5 after 30s ''No Heartbeat Packet receive''. Is there something i missed? I notice that when i am trying to Load settings the mavlink trying to send the following commands ATI AT&T , ATO wich is not recognized by the xbee module.

Start by reproducing the XBee-to-Mission Planner connection described in the issue, including the Initial Setup/3DR Radio “Load settings” flow and the reported AT commands. Compare the expected radio protocol with the XBee module behavior; done means settings load successfully and Mission Planner receives a heartbeat from the APM2.5.

Written by the indexing model from the issue text.