WIRELESS LINK FOR SKY+ BOX. I BORUGHT A WIRELESS CONNECTION FOR MY SKY+ BOX BUT WHEN I SWITCH IT

Question

I BORUGHT A WIRELESS CONNECTION FOR MY SKY+ BOX BUT WHEN I SWITCH IT ON THE SKY PICTURE DISAPPEARS FROM THE SENDER TV AND WHEN I GET IT BACK ON ANOTHER CHANNEL THE SOUND GOES ON NOTH SENDER AND RECEIVER TV.

HAS ANYONE GOT ANY SUGGESTIONS?

THE WIRELESS LINK IS PLUGGED INTO THE SCARTS ON SENDER AND RECEIVER TV'S.i removed the scart connection coming from my tv into the sky box
i then plugged in the piggy back scart of my philips slv3220 wireless transmitter and switched it on
i then plugged my tv scart that i removed piggy back into the back of the wireless transmitter
i expected the sky picture to reapear. it didn't
i tried the procedure with 3 different scart cables with no success
i passed the unit onto 2 friends with sky plus
they had no problem
i only have sky basic package