musikcube doesn't want to play some music

[Roma2047-png]

I have my music organized into folders. Some appear to be playing with their name, but others appear with the music path and don't play. Why is this happening? For example: When I try to play it, the message "playback stopped" appears. I also mentioned that some are .wav files, but I still have .flac files, and the same thing happens to them. I go into the logs and this appears. What does this mean?