Why is one folder on my Samsung Galaxy SII not being properly showed on PC? There is one folder on my device (not in the microSD card) with mp3 files that used to work perfectly but suddenly started to cause a malfunction when I try to open it on a PC. It is said to have no files in it and all of the other folders stop being recognized after this until I reconnect the device. However I can always get access to the folder content through the cellphone file manager system: the problem is only happening when connected to a PC via USB cable.

Does anybody know why is this happening and how can I fix it?

Device: Samsung Galaxy SII.
I finally found the solution (actually I even had left it behind...). Sometime after I posted this question I create another folder and after a while it began to have the same problem. Today I realized that both folder had one common caracteristic: they contained characters beyond the basic ASCII Table (one was called "Músicas" and the other, "Vídeos". When I renamed them ("Musicas" and "Videos", respectively), the issue was solved.