Yes, unfortunately you'll have to keep trying different firmware in the hope that one will be compatible with your player.
Have a look at the 9.x.x firmware that are available here:
http://www.mympxplayer.org/actions-9...ware-dc37.html.
There are lots of other firmware versions available here as well:
http://www.mympxplayer.org/firmware-dc4.html.