Problem while installing Mobile Joomla 1.2 on Joomla 2.5

During installation of "Mobile Joomla 1.2" on Joomla 2.5, to the stage where it asks me to install the database "scentia Mobile db", gives me a generic error and asking me to contact the "postmaster​@​nomedominio.it." Everything stops, apparently correctly installed, but the component does not work. The website is hosted on a server hosted by Aruba SpA that meets all the system requirements from the same component.
Who can help me? What can or should I do?