ITunes on macbook pro won't let me put music on iPhone 5? How do I fix this?

I just bought this macbook a week ago and whenever I download a song and try to drag it to my iPhone it doesn't work. What is going on? How do I fix it?

Follow the steps here-> http://support.apple.com/.../kb/HT1535

Also, be sure you are logged in to iTunes on both devices using the same Apple ID and password (for purchased songs).

  • Why won't iTunes let me put music on my iPhone? I just updated my iTunes last night with the intention of putting new music on my iPhone 4S. I have music on my iPhone from different computers, so I don't want to sync my phone and lose everything. This new layout has me really confused. I drag the songs I want on my phone over to where my phone name comes up, but it won't let me do it. Does anyone know how I can do it?
  • Why won't iTunes let me put music on my iPhone? - 1 Hi so a few months ago my laptop before I got my iPhone so I didn't have a laptop to add music so I used my sisters laptop so I synced it to hers and everything worked fine. Recently I got a new laptop and synced my iPhone to it but its not letting my put music on my phone. Could this be because I have my phone synced to another computer if so how do I change this?
  • New itunes won't let me download music to my iphone, how do I fix this? So I downloaded a couple of songs off youtube, and usually I can just sync and the music will be on there, but I downloaded the new Itunes and I can't figure out how to do it. The songs are in my library and Itunes keeps telling my phone can't be backed up also when I plug in my phone, it is highlighted grey like it's not selectable.
  • ITunes won't let me put music on iPhone? I want to sync about 100 songs onto my phone, I've already got 4, 2 GB free on my phone, but it keeps saying "… Not enough free space to hold all the items in the itunes library (additional 1, 43 GB required)." 100 songs are 5, 6 GB? I don't think so, so can someone please tell me where this is going wrong?