hello my layouts are powered by lw 125 transformers - i bought a new whistle tender for ac current and it would not work with my built in whistle button - so i bought a sound activation button - still nothing - sat it my dc current southern express 0 track by mistake and the whistle sounds when the dc current train is in reverse - please help i bought it for my old ac current layout thank you for your time
p.s. it was brand new in the box when i got it saturday