iPod 6th Gen Nano syncs but when I unplug it there is no music on it

Hi all,

My ipod 6th gen has just started doing something odd.

When I plugged it in it said it couldnt be read and I had to restore it.

I did this, but now when I sync'd all my music back to the ipod, it seems to work, but when I unplug the nano and try to play some music there is nothing available to play.

Any ideas?

I have the latest version of itunes, and the ios on the iPod is up to date.

The Sync seems to work, and in itunes you can see that there is music on the ipod. But the ipod itself shows nothing available to be played.

Pls help!!!!!