[phpOpenTracker-general] session_register() & Incorrect key file for table: 'pot_visitors' problem

Hello list,

When I request a page that contains this code:
<?php
// prepend phpOpenTracker
include 'phpOpenTracker.php';
// log access
phpOpenTracker::log();
?>

I get this error message:
Warning: session_register(): Cannot send session cookie - headers already
sent by (output started at /srv/www/htdocs/jeroen/tracker/testlog.php:5)
in
/usr/share/php/phpOpenTracker/Container.php on line 67

Warning: session_register(): Cannot send session cache limiter - headers
already sent (output started at
/srv/www/htdocs/jeroen/tracker/testlog.php:5)
in /usr/share/php/phpOpenTracker/Container.php on line 67

phpOpenTracker Error: Incorrect key file for table: 'pot_visitors'. Try to
repair it


Any idea anyone? I run phpopentracker 1.5.1 on suse 9.2.

Does phpopentracker require register_globals=on ?

thanks
jeroen