Why not home-made ringtones iphone voice

Users questions: I manually put ringtones into the ringtone directory * Library * Ringtones (the assistant used 91 mobile phone file manager) and has converted a good m4r file, and not more than 40 seconds, a total of only 600k, why the point of it on the phone no sound? (Previously successful Over) into the ring with 91 simultaneous connections next time there is no synchronization, very depressed! This method is better sustained. Please, help look what went wrong? Thank you for my daughter here!
Experts answer: 91 since you have a good way to teach you: you directly to m4r ringtone files to * p rivate * var * stash * Ringstone directory in iTunes, then drag the file in the future no matter how you ring tones will not disappear simultaneously, and the iPhone is your custom ring tones and ring system with separate display is not show Moreover, this approach has not upload ringtones 40 seconds or a few hundred k in size limit! Try it I have always been such a transfer ring tones
  • This information provided by the users.Thanks!