i contact the live troubleshooting chat of MJ, and in this order they meke me do this:
1.Download and Run Downgrade.exe (1.80.5180.3671)
2.Format the Phone disk
3.Download and run mjrecover
4.Unplug MJ and wait 60 seconds
5.Download and Run Upgrade.exe (1.90.5212.3671)
6.Download and Run Downgrade.exe (1.80.5180.3671) again
7.Upgrade drivers for USB EMP Audio Device (no better driver found)
8.Download and Run Upgrade.exe (1.90.5212.3671) and wait until eternity to "Ready to call" (The attendant of the customer service, in case that she doesnt be a "robot" , no answer my questions anymore and the chat stays on "Wait a few moments")
I use Windows XP fully updated, so i dont know what else do
I Apreciate any help from anybody