Recently, we lost the ability to use our lights on dimmers 1-24. Wierd things are happening. Somehow, the top row seems to be linked to the bottom row. For instance, if I move slider 7 up, the red "Edit MEM" button fades up. The same thing happens if I use slider 19 (right below #7). If I move slider 20 up, the green "IND 1" button fades up. The same thing happens with slider 8 (right above #20). The bars in the display move up with the sliders, but no lights come on. Everything on dimmers 25-48 seem to work. When I push the green "1-24" button, the "<" button that is left of the wheel lights up. It goes off when I push the green "25-48" button. Any ideas?