Hi antoniorocha,
Thank you for using the Xerox forum.
I have researched this issue and could not find another one similar.
This sounds like a software corruption issue and would require a service technician to check for the latest software and reset the software. They can perform a backup to retain your address book, email and network settings.
You can contact our specific product support experts at the following link: Fast Track to the Expert or call 1-800-835-6100