Help With Whistle

I'm new to trainz but worked up the courage to make a whistle for my favorite train N&W 611.
I found a tutorial on how to make three part whistles and followed it well. My whistle has all the parts I see in others I have downloaded, but for some reason the idle doesn't work.
The start and stop function well but the sound cuts out in the middle. I have three-part set to 1, and set the kind to hornsound.
I put it on the DLS named-- 3 part N&W 611 Handcock Long Bell 3 Chime -- and its kuid is <kuid:890804:100074>
If anyone can go into explorer or look at it and help me get it working I would be very grateful!
Thank You,
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