MPman 155 recovery mode problem

[emepetres]

Hi everyone, this is my case :

my mpman 155 used to work almost fine for a while but then it used it hang in the middle of a song. First, I deleted everything but the problem remained then I read some of these topics and looked for any new firmware and I found one in the official mpman url so I connected the mp4 to my computer and run the program to flash it and install the firmware and thats what happened:

there were two % bars in the software The small one for uploading and the big one for progress. the smaller went to 100% within some minutes and then started again, but the other never showed any progress. After 2 o 3 hours i decided to disconnect the mp4 (I know that shouldnt be done but after so much time...) now the player is blank , no software and when i connect it to the pc it is recognized as STMP3500 and when i try to install the drivers to run the recovery mode, it stops in the middle of the installation and says theres an error in the .inf file

Any help?

[lattesurf]

emepetres , what processor chipset is your player currently using?

[emepetres]

I have dissassebled it, it says : Processor SIGMATEL STMP 3504
and another saying hynix KOR .
by the way it has 1gb.