PHP.5.2.1 Upgrade, CGI Error. Please help

Hi,

I've just upgraded my web server with the new PHP 5.2.1 from 5.1.6
However, my PHP is still not working. It output the error that says,

-------------------
CGI Error
The specified CGI application misbehaved by not returning a complete set of HTTP headers.
-------------------

These are the steps I took to install PHP
I'm using the PHP zip package :

1.) extract the package to c:\php512
2.) set the new directory to .php extension in IIS
3.) add new php-cgi.exe to Web service extension is IIS
4.) restart server

You can have a look here:
http://www.skzhosting.org/phpinfo.php
http://www.skzhosting.org

It seems that IIS is still working fine, but PHP is the one that is not working.

Please help,
Thank you