I have solved the problem.
As i said in the previous post, there was a response error -7.
According to libusb error code list it means there is a USB Timeout.
I downloaded the source code from your git page and installed QT Creator.
There i in the hidthread.cpp file i changed the THREAD_TRANSFER_VALUE from 500 to 5000 to give it more time.
It did the trick.
The board is now working properly, thanks a lot!