Xbee ZB Will respond to +++ then next command then will respond to nothing? What is up with that

I have just installed the latest rev of XCTU for Windows. And am attempting to talk to xbee. Update series 2 module to latest firmware. Using terminal mode in XCTU I am able to turn on command mode, then Xbee, I have several will respond to maybe one command after entering command mode i.e. ATSL and I will get a response, then if I immdediately follow with ATID or similar no response…The whole communication process with all of the xbee modules that I have purchase seems extemely finicky and random. I have also tried communication with an older version of XCTU on a Vista Machine, and well as with a Mac. All respond pretty much the same.


There is command timeout, before giving any command issue +++