Recorded CD's Not playing

I subscribed to iTunes Match to be able to hear my old music recordings on all of my devices. Some of my music will not play in Apple Music. The albums and songs are there in the library but either the entire album or just a few songs will not play. They are not highlighted. The whole reason for subscribing was so I can continue to play music that I have acquired over many years, including CD's that I copied to my iTunes library. The songs still work on my iPod touch but it is not connected to the internet. I'm afraid I will lose access if I connect it to my iCloud library.