iTunes Match songs grayed out, then gone
I have a MacBook Air where I don't keep any tracks locally, but access them through iTunes Match. For no reason, one day I find all tracks grayed out and I was unable to play them. I turned off iTunes Match and the tracks were all gone. When I turned iTunes Match back on again, the tracks never showed up. When I click on update iTunes Match it does nothing. I have other devices where I can access the tracks stored in iTunes Match without a problem. How do I fix this?
MacBook Air (13-INCH, MID 2011), OS X Mountain Lion (10.8.2), iTunes 10