Local files sync to iPhone

[urzq_g-1hzp4s]

Plan

Premium 

Device

iPhone 6s and pc with windows 10

Operating System

iOS 11, windows 10

My Question or Issue

 I am able to listen to the local files on my conputer, but when i open the playlist in whch they are in on my phone they do not appear at all. I have read about people sayng that they are greyed out, but in my case they dont appear at all. I have tried to download the playlist on my computer and iPhone on the same network, but this still doesnt work.

[DutchTheODST]

Little question, you are sure you are on the same accespoint/router network as your PC/Mac is?

another one how is de PC/Mac connected?(wifi or cable)

Tried it just here but and it worked flawless.