Hazak , is your player working properly or is it dead?
If it is working properly and you are looking for a new upgrade, do not do it. As it will most likely kill your player.
If your player is dead, then you will need to use the MP3 Utilities Upgrade Tool to flash in firmwares downloaded from the forum. You need to try every single firmware for your chipset.
If the Upgrade Tool does not reconigse your player, then you will need to follow the Dead player REcovery guide here
http://www.mympxplayer.org/dead-play...ide-vt567.html