Loadvars getting vars from a php file

i have this simple php file set up
<?php
$name1 = "Hello";
$name2 = "World";
echo $name1 . $name2;

?>

i want to load them up in flash
the action script in flash

var myLoadVars:LoadVars = new LoadVars();
myLoadVars.onLoad = function(success:Boolean) {
if(success) {
trace(myLoadVars.name1);
trace(myLoadVars.name2);

}else{
//throw error
}
}
myLoadVars.load("http://localhost/dataDriven/loadvars.php");

however i get this when i test the movie iin flash

undefined
undefined

can anyone point out my mistake
thks