problem med sessions

hejsa all

Jeg plejer nu ikke at have de store problemer med sessions, men på min nye server får jeg nogle problemer ved registrering af sessions...
jeg får denne besked...

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

den registrerer heller ikke mine sessions..