mafioso3 , what state is your player currently in? Does it get detected by the MP3 Utilities Upgrade Tool? If so, you'll need to try all the v3.5.37 firmwares here
http://www.mympxplayer.org/actions-3537-dc16.html
Alternatively, if they do not work, try the v3.5.35 as well here
http://www.mympxplayer.org/actions-3535-dc15.html
There is no way of telling which firmware would work properly with your player, so you'll need to try all of them.
Good luck.