LoadVars + php = undefined

This should be a rather simple thing to do. Server is running, files are in my htdocs folder.

but it just reports undefined. Any thoughts?


var cat = new LoadVars

function printOut(success){
    frankencat.text = cat.id;
}

cat.load("test.php");
cat.onLoad = printOut();


<?php
     print "id=lalalalalalalalalalallalalalalalalalalalalalalalalalalala";
?>