quick and easy one - wireless modem

hey there..
just working on some of the other wireless programs for my base..

but i can get my "lights" to work..

local m = peripheral.wrap("right")
m.open(1)

local event, modemSide, senderChannel, replyChannel, message, senderDistance = os.pullEvent("modem_message")
local light = "off"

if light == "on" and message == "smeltery" then
  light = "off"
  rs.setOutput("back",false)
elseif light == "off" and message == "smeltery" then
  light = "on"
  rs.setOutput("back",true)
end

i dont get any errors from the code, but it wont turn the lights on or off, when i use modem.transmit(1,1,"smeltery") on another computer
am i doing something wrong in the code somewhere or??
theres 72 blocks, between the 2 computers

Normal wireless range below y=92 is 64 blocks, so they are likely too far apart.

arh okay.. will have to move the main building then :D/>
thanks :)/>