I have a new problem. I noticed when I blow the whistle/horn, and hold the key down, Trainz freezes temporarily. I'm using TS 12 SP1. When I release the key, Trainz starts moving again. What cud be causing this? It's also happening in Trainz 2010.
By holding down the key you are causing it to continuously repeat and probably flooding the keyboard buffer? Same as if you are in a text editor, keys used for text are not normally designed to be continuously held down.