Need help. Rednet Gps bomber program.

I need help with this program. I don't know why its not working.,

Host PC: http://pastebin.com/wsZW8avr

Turtle:http://pastebin.com/M3D2yUMS

Error, whats the unexpected behaviour?

So far i can see two minor mistakes. The host pc has a problem in the for loop, even though you don't need an index you still have to define it. It should be:

for i = z, 254 do
  rednet.send("up")
end

The turtle program seems to lack one "end" at the end of the file. You both need to end the while loop and the if-else statements.