The address must be correct because I can turn the light on and off. Here's the log for the on event which turned the light on but errored on status:
ui:Response0F.84.30:setOnLevelText=0F.84.30,ON
uifinished:Response0F.84.30:setOnLevelText=0F.84.30,ON
si:0E 0D B3 0F 84 30 05 11 FF
PLC:eventraw=03
PLC:eventraw=04
PLC:Response0F.84.30:setOnLevelText=send failed,0F.84.30
PLC:eventraw=03
PLC:eventraw=04
PLC:eventraw=03
PLC:eventraw=03
This is an Appliancelinc. I also set up a Keypadlinc Dimmer under Keypadlinc Relay and it turns another light on and off also but errors on status like the Appliancelinc. I'm not trying to control any X10 and none of my Insteon devices are set up to receive X10 signals.