My iPod Classic won't sync to iTunes
I've had my iPod Classic for about 2 years now and it's always worked fine. And now it won't sync. When I press the sync button in iTunes, the "syncing your iPod" screen comes up for about half a second, and then it gives the "iPod sync is complete, okay to disconnect" message, but there's still nothing on the iPod. I started by restarting iTunes, then restored my iPod hoping it would fix the problem, but it hasn't worked so far. I even ran the diagnostic test to see if the hard drive was possibly corrupt, but there were zero reallocs or pending sectors, so I have no idea what the problem is.
I am running iTunes 11.2.2 on my Mac, OS X 10.9.3
The device is an iPod Classic 160GB 7th gen
Help?