el warning es el siguiente
Unknow: your scrpt possibly relies on a session side-effect which existed until PHP 4.2.3.
Please be advised that the session extension does not consider global variables as a source of data,
unless register_globals is enabled. You can disable this functionality and this warning by setting session.bug_compat_42 or session.bug_compat_warm to off, respectively, in unknown on line 0
