Transcoding problems

[mikethehammer]

Hi to all,
I have this problem: there are some songs(mp3 format) I didnt succeed to play on remote devices. If I play the same songs through Jukebox player, so directly through subsonic server, they were played correctly, while If I try to play on remote devices, such as Pc, Ipad, android devices, they won't to play.
The log says only:
Starting transcoder: [c:\subsonic\transcode\ffmpeg] [-i] [f:\music\Porcupine Tree\Octane Twisted\Cd 1\1-01_Occam's_Razor_(Live)[1].mp3] [-ab] [96k] [-v] [0] [-f] [mp3] [-]

There is another strange situation: I tried to deactivate the transcoding for the player, and some of these songs now are played correctly, but others stills not playing.

I tried using both 4.9 and 5.01 beta version of subsonic, having the same results

Thanks in advance for your help