Xbee configuration

I tried to configure 2 Xbees on a PC.
Then I downloaded XCTU on aother PC and tried to connect the Xbees again…I keep receiving a msg that I have to reset the Xbees.

Any Advice?

What board are you connecting the XBee modules on?

What is the part number of the XBee in question?

What is the firmware version installed?

Thank you for your quick response
It is a S2 series (XB24-ZB)
I am using an xbee dongle
Firmware version is 20A7 for the coordinator and 22A7 for the router

who’s XBee dongle is it? You might need to adjust the driver settings for low speed serial devices.