You need to edit the class again and fill the 'Patrón de nombre de objeto:' field. That field should have the attribute you want for the object name. so, if your attribute is called 'title', you can just type <title> in that field.
Then you will need to republish your contents. for the new ones, name will be shown as expected.
It's better explained at http://doc.ez.no/eZ-Publish/Technical-manual/4.x/Concepts-and-basics/Content-management/The-content-class
I would add that the same principle applies to the url alias. And to update the names and url aliases, in the event of a change in the class, you can use the following two scripts:
bin/php/updateniceurls.php => for url
update/common/scripts/updatecontentobjectname.php => for names
TKS
Abdelkader RHOUATI
Blog (french) : http://arhouati.com
----
Extension arh_jdebug : EzDebug using jquery
