[artrafael]

I'm wondering if your music library got messed up somehow? Try using Music Files mode and open the folder for an album. Play the first track and see if it automatically advances playback to each of the subsequent tracks. This will at least let us know if there is some fundamental problem with playback or if the player simply can't locate the next item due to bad pointers (or something) in the library.

By the way, I appreciate your posting all the information and test results of your attempts to diagnose and resolve your problem.