I'm trying to do the free ringtone "hack" where I change te file extension. I'm using iTunes 7.4.1. I edited the Guns N' Roses song "There Was A Time" down to 25 seconds in Garage Band, exported it to the desktop, changed the file extension to .m4r, opened iTunes, and then went to the iTunes Ringtone folder and changed the extension back to .m4a. When I plug the iPhone in it says the ringtone is available to sync, so I sync it. What happens is I'm not getting any sound when someone calls me. I don't understand why. I followed the instructions, yet something must be going wrong... Anyone have any thoughts?