Firstly, do you know what version firmware you have/had on your player?
Have a look here:
Full Firmware: Thirteen 9.x.x.x firmwares. But they are 9.x.x firmwares.
Remember though, flashing your player with an incompatible firmware will render your player DEAD so don't do it unless you are trying to relive your player.
There are lots of other firmware available as well here:
http://www.mympxplayer.org/firmware-dc4.html.
Good luck.