Forms don't work

Hi, first I have to excuse my bad english, but I have a problem and I hope I can find help here. I've installed the Xitami webserver and PHP, both in the newest versions. At first everything seems to be fine, but the problem ist that variables out of a form won't be send to the next script by get- or post method, what means if I try to load a script with http://localhost/script.php?action=load the variable $action is undefined. Does anyone know how to solve thos problem? Is it PHP related or a Xitami problem? Thx for the help Frank Pohl