SKY HD box connecting to DVD recorder

 I have a Sky HD box which allows me to record any TV programme - perfect picture quality doing this. However some films recorded I want to keep - ie burn to a blank DVD. Therefore I connected a Scart from the SKY HD box to the DVD recorder which means I can the burn onto a DVD.

However viewing the recorded programme when it is transfered to the DVD recorder appears to have a shadow running continually across it. - Is this some kind of encription so you cannot do this or is it another problem.  If so how do I work round this as I like to keep films.

 Thanks