M6 wont format?

Hey guys. I've got the T version of this player and i have upgraded the firmware frequently went new firmwares has been released. Just now, when I tried to install the latest T2004.6, the player will just say "Upgrading software..", but then when I start the player again, I am "logged" into the menus again, just that that there are no menus. So it will not ask for a new resource etc.
I've tried with a various versions of firmware, but I get the same problem with every one.

Quite annoying huh? Some tips would be appriciated!

//NysoO

hhhmmm...
Did you also try to just copy on the appropriate resource.bin file onto the player simply?
If that doesn't work, did you also try to reinstall the latest firmware simply and then adding the same resource bin too?
If none of those work, my guess is DFU Tools...