iTunes song won't load in Djay pro

New on Djay. ook a great app but…
I am a iTunes user and have a Music subscription @Apple.
Now, I cannot load the songs that effectively bought in iTunes.
All the other songs won’t load…
Even if I have them local on my mac.These songs appear in grey.
An error message says there is an issue with DRM and the website says I should have iTUnes Plus subscription… Don’t know what it is. What I have is iTunes Match.
Can anyone help me?