After XBee pro 900 firmware update, can't establish link

I am using XBee Pro 900’s to communicate with a uav and have had it working for a year with no issues. I upgraded the firmware to try to solve an issue. Now, using the same settings as before, I can not re-establish communication to the uav. I have a 2nd set of XBees with the old firmware so I just copied all the settings from those to the new ones. I can also swap out the old ones and the communication is fine. With the new version firmware xbees, they are communicating with each other it seems. I see all the lights flashing when I fire up software that uses the Xbee port, and if I interrupt the dout on the one on the uav (I have the dout connection on the xbee on a toggle switch), the lights stop flashing like it isn’t getting info.

Is there a new setting in the new firmware that needs to be changed from the default setting? Can someone post a step by step guide on how to test the link between 2 XBees on 2 separate computers using xctu?

FYI, I am using the explorer regulated on one end and the usb board on the other. I have read about issues on the regulated with the xbee pro and that you need to place a jumper on a certain resistor. I never had to do that and had perfect communication without that. Is it possible this firmware requires that to be done? I was under the impression that this firmware fixed that issue.

Thanks

Shouldn’t we know first which firmware version you used and later updated to?

Yeah sorry. Went to 1061 from 1021