Had simular probs i the past with the trilink. thought I've had a faulty unit to only find it works in a different install. test the unit with a short length, 2M of coax to the eye, make sure the ir blasters are infront of the freesat box, then cover with a towel or blanket ( to make sure the box isnt picking up the IR from the remote. try using with the eye. if it works, then u may have a stray screen strand touching the copper centre of the coax, seen the light, light up even with this short.
if it doesnt work, may be the unit