URGENT: session information

Hi all! I'm a newbie in PHP and i need to make session control of users to my final graduate project. I already read a book about PHP and started with a few examples (about sessions) taken from there but in the browser i get the text "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" and the session code which as suposed to increment a counter doesn't work. Do i have to make any change in the way functions are called? Any help would be much appreciated. ---------------------------------------------------- António Rafael C. Paiva Electronics and Telecommunications Dep. Aveiro University