Hi ismaelpc.
I cant remember if it was here or at some other mpx forum, but I remember someone saying they were able to match the action chip code to a code in the download section of this forum.
They got their player working this way. I just wish I could remember where I read that.
I colored my hair ash blonde on Sunday night. I have a feeling I shouldn't have done that. lol
Have you checked for the fimware you need at the download section? Its at
http://mympxplayer.org/firmware-dc4.html