Error: Failed to open stream: Permission denied

[mossberg45]

I'm a PHP newbie and I'm getting the following error when viewing a form that I created in PHP.

 

PHP Warning:  require_once(C:\Sites\www\custom\templates): failed to open stream: Permission denied in C:\Sites\www\custom\templates\info_request.php on line 3

PHP Fatal error:  require_once(): Failed opening required '' (include_path='.;c:\php\includes') in C:\Sites\www\custom\templates\info_request.php on line 3

 

I'm on a Windows 2008 Server R1 (64bit) running IIS 7 and PHP through Fast CGI and MySQL server 5.1. Except for this issue PHP is running fine on the server. I'm running PHPMyAdmin and a couple other PHP apps just fine. I confirmed that I have permissions set correctly (have even run php files at the directory and file level under full control to test)

 

Appreciate any suggestions on how to troubleshoot this issue.