In my iTunes library there are many tracks that have the cloud with embedded arrow (indicating that I need to download them from the cloud), but which are grayed-out, so that I can't download them, play them, or do anything. Can you tell me what is wrong?
You have probably already looked into this, but it sounds like "iCloud Status" is enabled in iTunes, but "iCloud Download" might not be. Go to
and make sure that "iCloud Download" is checked off.