Paul, i put my number on here all the time, to help people. I so wish people would read other posts, it would help you so much. Your problem is so easy to resolve, you have twisted the tamper pair together, so why havent you done the same on the alarm pair, or the n/c pair as its known. Do Not twist the 12dc supply pair together whatever you do.
J 07842 480037 I am on this number 7 days a week,
J, June 2009