unable to set my register

hi,I’m with xbee and i am unable to set th MY register i use those xbee

      xbee                        firmwares
      XB24B                         1020
      XB24B                         1220
      XB24-B                        1247
      XBP24B                       1247
      XB24B                         1020  

on those xbee i can’t set my register there is something wrong i think its not the good firmware I need help

thank you

This is because MY is a read-only field in ZNet 2.5 and Zigbee/ZB. Details can be found in the Product Manual for the appropriate protocol.

ZNet 2.5: