I took a audio file and sliced it to be 24 secs and saved it as mp3 (on Windows platform) I opened that file on Mac iTunes and then saved that to AAC type. Now, I opened the file info and updated it to be m4r from m4a. However, the desired result of this file now showing up in my ringtones is not happening. Can you PLEASE help? Thanks I have iPhone 3G and the latest version of iTues.