I run my Lionel trains with two different Lionel 80 watt transformers. Recently I was given a new Williams Amtrak locomotive with horn. It runs fine with these transformers. But pushing the whistle button on either of the transformers, there is no sound of the horn. None at all. I am surprised the engine runs so smoothly, but no sound comes from the engines song either of these transformers. What gives? Any suggestions or comments? Thank you.