[android-developers] Media player problem whit file audio stored in memory

hi guys i have this strange problem:
i create a app, in this app i record voice in ogg file, i store file
in memory (i see the file using DDMS) , when i wont to play the file
audio i have a error

in this link you can see the source: http://pastebin.com/PWE9FsxT
in this link you can see the android manifest: http://pastebin.com/p39J1Y6i
in this link you can see the log cat http://pastebin.com/ktyFWPXq

i think the problem is in
mediaPlayer.setDataSource(RECORDING_FILE_NAME); but I do not know how
to fix it
please help me
best regads
Antonio

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