Php Script Not Executed - Need Help! O_o

Hi, can anybody help me?
I've just installed EasyPHP 5.3.2i on two windows 7 pcs, and in both of them i encountered the same problem.

When i open a php page from local web it shows the page without executing the php script part.
It shows the html part without mind to the php part, for example:

<?php
require("dbmanagement.php";
if(!session_id()) session_start();
if(!session_is_registered(_userid))
{
$_SESSION['source']=$_SERVER['PHP_SELF'];
header("location:login.php";
exit();
}
?>

I've tried in my altervista webspace and it worked well redirecting the page to login.php not showing the control panel.
In all the logs files there aren't any errors and everything is running propely.

Do i miss to config something?
Thanks in advance.

P.s. I've just tried EasyPHP 5.2.10 as well...same!
The only error i found in logs is about favicon:
File does not exist: C:/Program Files/EasyPHP5.2.10/www/favicon.ico



Edited 1 time(s). Last edit at 07/19/2010 08:21PM by Dk.