Can't drag & drop from iTunes 10.6.3 to iPhone library?

I just tried adding music to my iPhone from iTunes 10.6.3, but it won't let me drag any of the music on my iTunes library to my iPhone library. I've tried dragging them directly from a folder to my iPhone library, but I still had no luck. I'm running on a Mac OS X 10.8.

Click on your iPhone under the devices menu on iTunes, is it on "manually manage music, etc"?
If so, then you better use the express lane from apple, it helped me.

With iTunes you don't drag, you sync.

  • Why won't my drag and drop syncing on iPhone 4 work all of a sudden? I have the newest version of iTunes and an iPhone 4, I've always used the drag and drop function to add new music to my phone. All of a sudden it just doesn't work anymore. Somebody please help me, this sucks! Why has this happened?
  • Why won't iTunes let me drag individual songs onto my iPhone? I have the new itunes (11) and it won't let drag individual songs onto my iPhone. I tried looking it up on the internet, and one person said "make sure that your iPhone is setup to sync your songs manually instead of syncing only the checked songs/videos." What does that mean? I don't want all of my library on my iphone… Please Help!
  • Why can't I drag my downloaded music to my itunes? Sometimes I download music from mp3 skull and save it to my computer and then drag into my itunes for my iPhone whatever and it always works. But I just saved a song and when I just tried to drag it into my itunes there was a little red circle symbol with the line through it saying no, is there anyway I can fix this? I tried re-connecting it and doing it without the phone plugged to my computer but still nothing… Help please!
  • Why can I no longer drag playlists made in my itunes to my iphone? I used to be able to plug my phone in then just drag my playlists into the phone. I've always kept the phone settings on manual so I can manage the music myself. Now, since I've updated to the newer version of iTunes, I can't drag the playlists over, or the individual songs within it. It's driving me insane