SVG from IREV server question

[Michael Kann]

Perhaps someone with some fresh eyes can help me out. I'm trying to serve up an SVG image from the IREV server. I started with a PHP script that works:
----------------------------------------
<?php
  header('Content-Type: image/svg+xml');
  echo '<?xml version="1.0" encoding="UTF-8" standalone="no"?>';
?>
<svg width="100px" height="100px" viewBox="0 0 500 500" version="1.0" 

xmlns="http://www.w3.org/2000/svg">
<rect width="100" height="100" fill="blue" />
</svg>
----------------------------------------
Converting to an irev file, I tried out a few different lines to send out the header and the xml info, but nothing worked. Has anyone made this work?

Thanks in advance,
Mike