I contacted tech support, and I solved the problem on the day (during the weekend by the way). The great Manimaran was helpful, quick and patient.
Thank you very much, keep it up.
Just upgraded I found a problem with joomla administrative menu, but the Mad4team solved everything in a half hour. Great! I highly recommend the upgrade to the PRO version, because the software is intuitive, practical and useful.
Thanks again to Mad4team for fast and effective support.