Thank you, but is not working yet. This is my config file:
// phpBB 2.x auto-generated config file
// Do not change anything in this file!
$dbms = 'mysql4';
$dbhost = 'localhost';
$dbname = 'a9446331_phpbb1';
$dbuser = 'a9446331_iuscan';
$dbpasswd = 'password';
$table_prefix = 'a9446331_';
On this representation I've changed the password, the other informations are real.
I have tried the a9446331 prefix on the user and without the prefix; I have tried a password created by me, and an automatic generated password. I don't know what I must try yet.