gazzataf, Do not try to upload a new firmware to your player as it will more than likely brick it. My first suggestion would be to format the player if you can. You could try to do this with Windows or the MP3 Disk Tool that is part of MP3 Player Utilities there are several versions available in the Downloads>Tools section.
"lattesurf" posted an excellent guide on how to best use the tool to fix memory problems here:
http://www.mympxplayer.org/how-to-re...ck-vt2400.html
If that gives you no joy then the cable may very well be faulty which is not that uncommon.