Problem with EPPM P6 R8.2 professional don´t recognize special characters and put ? instead

 Problem with EPPM P6 R8.2 professional don´t recognize special characters and put ? instead

I have EPPM P6 R8.2 with next configuration:

Server application and databse are the same: 

-OS  Windows Server 2008 R2 in spanish

-Database Oracle 11g Express.

-Instaled EPPM P6 R8.2 SP1 and with P6 , TeamMember and Progress Reporter.

On clients:

-Windows 7 64 bits in spanish

-Professional P6 R8.2 SP1

Problem:

On clients for example if I write or put a project or activity with special character on P6 Professional R8.2 as "Diseño Adecuación" and I can see it

but when I close Professional and log in on P6 Web R8.2 I just see ? instead special chatacter as "Dise?o Adecuaci?on" but only happen on client Professional not with P6 Web.