INCREDIBLE!!!
Here, in a desperated act, we turned the camera on the 2004 RC (It haves a TTL port), by updating the firmware and downloading the 2.4 code. It works.
So we tried to do everything by the beginning with the 2005 RC, downloading the 2.4 code clean on the
IFI webpage, updating the firmware again, and then.... TADA!!

THE CAMERA NOW IS WORKING!! Our team is very happy now.
I think that do everything by the beginning can help the teams with this problem.