Hello Jim,
Thank you for the details of the issue you are experiencing with iTunes Match on your iPhone and iPad. I found an article with some steps you can take when you're not able to play songs using iTunes Match.
I recommend reviewing the full section titled "If you are unable to download a song, play a song, or access songs from iTunes Match":
iTunes Store: Troubleshooting iTunes Match
http://support.apple.com/kb/ts4054
Thank you for using Apple Support Communities.
Best,
Sheila M.