Flash Output Error

[kdkr]

I have been working on the tutorial about AMFPHP at http://www.sephiroth.it/tutorials/flashPHP/amfphp_installation/index.php I've backckecked all the code in the .php and .as files and their paths in the browser, but find no scripting or pathing errors. When tested in Flash, I recieve the follow Output message:
Error opening URL "http://localhost/flashservices/gateway.php".
Any comments on what is causing this would be great help.:cool:

[kdkr]

My error was because of the security settings of the firewall.