Simple php page gives 404 error in Magento

Question

For testing purpose, I created a folder and created a test.php file in my magento site.

It contains:

<?
echo "Hello";
?>

It works on one machine but not another machine. I chmod 777 to the file but it didn't work. If I create a test.html file it works fine.

I guess that it's configuration issue. How do I fix this issue?

Thanks.

Sam