Hi Jon,
Thanks for getting back to me, much appreciated. I keep the key cards in a special box by faraday, its supposed to stop any thieves copying the soft ware from my key cards. This apparently can be done from outside your house with a special gadget that can be bought at Amazon. I have fitted both cards with new Duracell batteries, so we will see how we go from here..
Thanks again ,
Geoff Evason.