I tried changing the batteries and still no luck..
I have taken the aerial and receiver out of the electrics box, sometimes it works, when its in it doesn't work at all. Also I've noticed that the signal is not very strong as the green light is meant to be ON when both transmitter and receiver are turned on, but sometimes it stays on, then it flashes, then it stays on, like there is some sort of interference..
Also sometimes it works for a bit, other times it doesn't work at all..