Nick,
I have run the scanner and it haven't found any device... I tried changing the values of the pull up resistors (that ones that is between the lines and the SDA, SCL gates) for a upper value (10k) and a lower level (1k), and I still have got anything. My original pull up resistors was 2k2.
I think I got a broken CI. I gonna try to change it and I post here my future results.
I appreciate very much the help given!!