I was trying to install Rockbox on an mp3 player I found in my closet and when I put it into maufacturer mode it shows up under 'Other Devices' as Tango Digital Media Platform in device manager. When I try to install drivers, it gives an error "The third-party INF does not contain digital signature information." and it's not detected by the utility. How do I make it come up under Universal Serial Bus controllers?