Failed to play audio file located in subfolders in Documents

i have an audio file test.mp3.

when the file located in "Documents" folder, and i create my media object like this :media = new Media('documents://test.mp3'); Everything works fine.

but when my audio file located in a subfolder in "Documents" folder, say "Documents/data", and i create my media object like this: media = new Media('documents://data/test.mp3'), i have this error in console: Failed to initialize AVAudioPlayer: (null) . And error code = 4