[Xitami] Simple PHP

[JPSmith]

I have this simple PHP code that does not display properly when called 
whith this link:
<a href="welcome2.php?firstname=Kevin&lastname=Doe"> Test please! </a>.
It is displaying only the following : Welcome to our Web site, !

Other complicated stuff, like accessing MySQL, works properly  in Perl or PHP.
Is this a Perl or Xitami question? How to fix it?


<------------------------->
<html>
<head>
<title> Query String Link </title>
</head>
<body>
<?php
   echo( "Welcome to our Web site, $firstname $lastname!" );
?>
</body>
</html>