Play my iTunes library on Plex

My server is a Qnap TVS 471. My iTunes library is on Win 10 pc on same network as Qnap. I have allowed sharing of xml on iTunes preferences and enabled iTunes in Plex server settings and effected restart. As this did not show iTunes channel entered xml path c drive on my pc - restarted - still nothing. No posts seem to exactly mirror this and many appear to indicate that it should work. Conclusion I am doing something wrong - can anyone help ?

Create a library in plex, and point the folders at your itunes library like any other folder.