Can't import CD tracks into my sisters iTunes Library?

My sister recently went out and bought the Midnight Memories CD by One Direction. Her netbook doesn't have a disc drive, so I offered to use my dad's laptop to copy the CD onto a flash drive to load into her library. When I go to drag and drop the songs (all 18 of them), The arrow has a red cross and won't copy the songs to the library. I tried doing it manually too, but that didn't work. I tried it with iTunes 11 at first, figured dragging and dropping songs was a dleeted feature so I uninstalled it and installed itunes 10.7, but I'm still having the same issue. And it's only like this with CD tracks, songs I've downloaded for her from the internet copy just fine. Could it be an encoding error? And if so, how can I bypass it?