I am not able to download those PHP files, please post some code here.
You can try to debug the script by displaying errors.
Put this at the very top of your script:
error_reporting(E_ALL);
@ini_set('display_errors', '1');
I wish I could help but theres no code for me to work with. From the looks of it, theres either a syntax error or you do not output anything to the browser.