How do I get rid of a Warning

I get this warning on a few pages, especially the members login page (members.php):

Warning: Unknown(): Your script 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_warn to off, respectively. in Unknown on line 0

Only 1 file has sesion.bug_compat_42 - config-dist.inc.php

if (!defined(INCLUDED_AMEMBER_CONFIG)){
define('INCLUDED_AMEMBER_CONFIG', 1);
ini_set('session.bug_compat_42', 1); <-- 1 to 0 ?
set_magic_quotes_runtime(0);
global $config, $plugins, $plugin_config;

to turn it off, do I change the 1 to 0? If that's the case, then it doesn't work and I still get this annoying warning.

Any help would be appreciated.

Thank you,

Scott