i recommend you not to upgrade your firmware as it might kill your player.
instead just dump it, repair it and reflash it back to your player.
http://www.mympxplayer.org/how-to-ex...tool-vt66.html
if that doesnt work too, please try formatting your player.
http://www.mympxplayer.org/how-to-re...ck-vt2400.html