My SanDisk MP3 player model SDMX1-512R has an Error code that says "Reformat Internal Media with SIGMATEL teleformatter". I cannot reformat when I connect it to the computer. It shows up as Drive H and not as the SANDISK device as it has before when I connected. If I try to open it, it says it needs to be reformatted, nut then it won't let me reformat it. How do I reset it with the original software?