Using iTunes Library with LMS and pCP

I'm helping someone start with LMS and piCoreplayer

He would like to use his iTunes library on his iMac.

I don't know yet, which OS he is using on the Mac but I can practise on mine.

So El Capitan with iTunes

I exported the Library to Documents so the path is


I also have a xml file here

If I go to iTunes Plugin Settings and enter either string, prefaced by the IP Address of the Imac, I get a return message, viz;

What am I doing wrong ?

ronnie