do you have magnets on the back of the tape? if so make sure they have NO spacing between them. i have had issues before. also take out the little ice cube relays and smack them on the wall a couple of times this will reset the armature.....sounds odd but when they first came out that is what tech support had us doing, now you can order ones with "gold" tips. sometimes i think the tech's are just shooting from the hip hoping they get something right....LOL