Getting "Call to undefined function: 'define': in phalanger web site

I'm just starting out with Phalanger and hit a road block. I installed the latest from the Visual Studio Gallery and tried to create a simple web page. The sample web page that is create with a project works, but once I add to the index.php:

<?php
define("test","");
echo "Hello World!";
?>

I get :

 Call to undefined function: 'define' in c:\users\....

I can't seem to find a reference on the web to this issue, so I must have a setup wrong.