need firmware for sony td-66

hi brothers i hav a mp4 player that when is turned on and if i selects the music option it gets restarted... and when connected to the pc then the message aapears that the drive is either corrupted or unreachable.... and pc like responds slow...
now i need a flsher and the firmware for this mp4 player...
here r the deatilsfor this device..
sony td66
sc85051f
act_v3.5.35