Problem wih Session and register_globals

Hello, When I try the code below and register_globals=On, its work fine, the counter variable is incremented each time that I load the page, but, when register_globals=Off, its does not work, the counter variable is save just in first time and never more. <?php session_start(); // register a session variable session_register('counter'); $counter = $HTTP_SESSION_VARS["counter"]; // increment and display the value of the counter $counter++; echo("You have visited this page $counter times! Don't you have anything else to do, you bum?!"); ?> How can I fix this? With out to turn register_globals=On. Thanks,