Why can't I drag songs onto my iPhone?

Go to the bottom of the thread on this page, and the answer there might help you.

Is it formatted as Mac and you’re on Windows?

@aprilsimnel I’ve tried it but it doesn’t solve my problem, unfortunately…

@dverhey It’s formatted as Mac and I’m on a Mac.

One other box that you might need to worry about:

Click on your iPod in iTunes, then go to the “Music” tab. Is “Sync Music” checked? It shouldn’t be. Mine isn’t (though I had to uncheck it myself, even after going in and telling it that I wanted to manage my music manually) and I have no issues dragging from either of my Win7 machines to my iPod Touch,

@jerv Yes, it’s not checked but I still can’t move songs around :/

I have no idea how, but I just connected my iPhone to my Mac again and now it’s working as it usually did! Problem solved!

Thanks anyway for your help guys!