Skybox f5 have no signal on some channels like itv c5 sky sports one and two no disney no 3d but if I scan I can fined itv sky sports two but can't get disney ss1 or c5 I have tryed everything I can think of got a signal fix didn't work only 1 feed connected to dish tryed it on my mums dish and the same so I put it down to a faulty box. Anyone had this happen