To help us to debug this further, if you look in "/home/<your_username>/.ubuntuone/Purchased from Ubuntu One"
or from the terminal run:
nautilus "$HOME/.ubuntuone/Purchased from Ubuntu One"
Can you see the tracks you've purchased?
To help us to debug this further, if you look in "/home/ <your_username> /.ubuntuone/ Purchased from Ubuntu One"
or from the terminal run:
nautilus "$HOME/ .ubuntuone/ Purchased from Ubuntu One"
Can you see the tracks you've purchased?