Check to make sure that the “Manually manage music and videos” option is turned on:
1 Connect your device to your computer.
2 Open iTunes. …
3 Locate and click on your device.
4 In the left sidebar, click Summary.
5 Scroll to the Options section.
6 Click the box next to “Manually manage music and videos.”
7 Click Apply.
Manually manage content on your iPhone, iPad, or iPod touch using …
HasenChat Music – You a Freak