I've just downloaded it and some songs that I purchased won't let me play them. When I click to play it a little box comes up saying "You must authorize this computer before you can download previous purchases" And it has a little symbol across from it saying Download from iCloud.. I have no idea what icloud is but it wont let me click on it because it's not a link? So how do I fix this? Please be specific it's very confusing.
[Edited on 12.06.2012 12:42 AM PST]