i have a 1gb mp4 player don't know who made it. i downloaded songs to it an it was playing fine until i let my brother use the player. now every time i try to go into my music i keep getting DISK ERROR. why does this keep happening an what do i do to solve this problem. i hooked it up to my pc an clicked on the removable disk an properties i saw this tool that said check disk for errors but every time i use it nothing happens at all. still the same thing happens again