Song ringtones for my Iphone?

I do all of the process right, but when I try to add the AAC file to my 'tones' library I don't have one? So how do I fix that, I have a 4s with the update.

The ringtone should be M4R format. So you need to convert and then add to your iPhone. I use Syncios to make my own iPhone Ringtone. Hope it would help you.