Made custom ringtones in audacity and added to music library in iTunes. Next created AAC version of files and then changed file from .m4a to .m4r and added to tones section of iTunes. Next connected iPhone 4s to iTunes and under tones section checked the sync tones box and selected tones from list. Finally clicked sync button at bottom right of iTunes and waited for sync to be completed. Proceeded to settings-sounds-ringtones in phone but no new ringtones are shown other than the default. Please help.