Can't manage iPhone data on iTunes

When I plug my phone (iPhone 5) into my laptop (MacBook Pro), open iTunes (latest version), and select my device, there is no "On this iPhone" tab. [See image below.] Next to the "Photos" tab there should be a tab that says "On this iPhone," and when selected it shows the library of songs on your device, but I have nothing, so I can't see or manage any of the songs on my phone from iTunes.

I've restarted both the phone and the laptop, but had the same problem.

I've plugged the phone into a different computer and had no problem. I've plugged a different device into the computer and had no problem.

Does anyone have any idea what I could be doing wrong??