I have a caboose from the dl station and wish to add a whistle to it. The caboose has a rear platform view. It would be nice to have a whistle..just activated by the h key...for my long backup move..prototipical (isnt it?) So i found this whistle sound file on the dls and paste it in the config file of the caboose. no go yet. How do I make this work? thank you