Finally I managed to get working this drive, it seems to be only a speed problem which I solved with diskdiag, a 1050-2-PC cable and ARFD utility... But I'm unable to format disk in enhanced format, altough I can read-write-format single density disk.
I've been watching the drive's head, and when formatting single density disk, it moves down to the end and then come backs to the start. When I try to format enhanced density disk, when it reach the end, doesn't move anymore. When I format from ARFD, I get the error number 144, and when I format from DOS 2.5, it keeps trying again and again.
Where is the problem?