Need help with ipod & iTunes

Hey guys how do I drag & drop mp3's from Windows Explorer to iTunes to place onto my ipod? I could do this in the past, but I think ever since I upgraded iTunes this does not work anymore. I have to add songs to the library first then from the library drag them to my ipod which is annoying as hell. I just want to open iTunes and drag and drop from explorer into my ipod, bypassing the whole library thing.

 

I was able to do this in the past before though. It's odd that this feature is disabled now.