SKY CARDS DO WORK! I have read several listing with people claiming SKY cards do not work on different SKY boxes. I'm not an expert in this field, but I am going to have to denounce these claims as "FALSE". The reason I have made this claim myself is due to experience. I have a sky card and have only today tried it on the fifth different SKY Digital Box. They all worked without a hitch.
I don't know the experience of these other people, but in my case I beg to differ. So before such claims are made, it is wise to chose ones words carefully in order not to misinform others. I hope this helps.