PHP Help Please

Hi all i have posted a similar question but i am now getting a different error so i thought i would start a new question.

Trying to get .php working on my iis 6 windows server and cannot get this working, i have followed various guides which all seem to contradict each other about versions etc.

I have installed Fast CGI and downloaded the zip file for php version 5.3.17 Thread safe

i have created a phpinfo.php file and put it on my site which has this inside

<?php phpinfo(); ?>

but when i browse to it i get the following error

The page cannot be displayed
 You have attempted to execute a CGI, ISAPI, or other executable program from a directory that does not allow programs to be executed.
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Please try the following:
 •Contact the Web site administrator if you believe this directory should allow execute access.
 
HTTP Error 403.1 - Forbidden: Execute access is denied.
Internet Information Services (IIS)
 
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Technical Information (for support personnel)
 •Go to Microsoft Product Support Services and perform a title search for the words HTTP and 403.
 •Open IIS Help, which is accessible in IIS Manager (inetmgr), and search for topics titled Configuring ISAPI Extensions, Configuring CGI Applications, Securing Your Site with Web Site Permissions, and About Custom Error Messages.
 •In the IIS Software Development Kit (SDK) or at the MSDN Online Library, search for topics titled Developing ISAPI Extensions, ISAPI and CGI, and Debugging ISAPI Extensions and Filters.


i really need help on this as i cannot install our new website and this has been going on for 3 days now.

Please please can someone help me