zerio , you'll be needing the v9.0.xx series firmwares here
http://www.mympxplayer.org/actions-9...ware-dc37.html
Install MP3 Utilities and start the Upgrade Tool, there are many versions in the downloads section. See if the software detects your player.
If it does, then you'll need to try all the firmwares for your screen size until you get a working one.