Are all the above receivers the same. Just bought a 2nd hand unit cos this receiver is meant to produce a better signal. However I got Sky to re-pair my Sky card to this receiver and cant get the card to work. Sky say that possibly the card reader is faulty. The person i bought the receiver from says the box was working fine up until the point they sent it to me. I can receive all the free channels no problem. Is there anything else I should be checking or do i get the receiver investigated to make sure the card reader is working OK. Could it be a Freeview Panasonic receiver and there is some block on using a Sky card. Or am I just unlucky and bought a faulty receiver.