I haven't worked on my HO layout for almost a year, but will be starting up again after New Years. I just redid my layout last year, and used the old Atlas switch machines I had on the old layout, but on the new layout, most of the switch machines don't work -- you push the button and nothing happens. Every one of them worked fine on the old layout, and I have checked all switch machines and controls with the voltmeter, and most of them check out fine -- I DO have current, but the switches are not working. Any ideas?