Apache 2.0.40 / PHP 4.2.3 doesn't load post data

[SeaEagle1]

I've the following problem: when I POST data to a php page (the textfield 'test' with value 'Do It!' for example) it don't show up there, neither when I use $_POST['test'] or just $test. When I use GET, it just works, both $_GET['test'] and $test. maxpostdata is set to 8M. Any ideas?

system: Win2000pro / apache 2.0.40 / php 4.2.3