It's most likely in one of the dependency packs, either a coupler, or bogie, or engine sound, etc. The reason it isn't in the payware package is usually because whoever made that particular item will not allow it to be included in a payware package, the want it to be a strictly free standalone item.
Email us at the support email and i will look into thia evening when im back in front of a Trainz pc. Out of town right now so i cant double check the files at this moment
