Installation/configuration problem with IIS and PHP on Windows XP Pro

I have a brand new Dell Inspiron 8500 running Windows XP Pro. I downloaded and installed the contents of PHP 4.3.4.zip as a CGI binary, following the instructions at http://us3.php.net/manual/en/install.windows.php#install.windows.manual and the configuration instructions at http://us3.php.net/manual/en/install.iis.php#install.iis.iis4. Running "php -i" from the command line outputs a blizzard of html tags, which suggests that the PHP installation is okay. I'm able to access .html files under C:\inetpub\wwwroot in IE using the "http://localhost", which show that IIS is running. I created the test file C:\inetpub\wwwroot\phpinfo.php which contains a single PHP command: <?php phpinfo(); ?> When I request this in IE with "http://localhost/phpinfo.php" I get "The page cannot be displayed" message from IE -- "Cannot find server or DNS error" I have been over the instructions several times, and consulted with a talented friend. I have also consulted the installation instructions in "Dreamweaver MX: PHP Web Development" (Wrox, 2003) and "Beginning PHP4" (Wrox, 2000). I have also looked through several hundred emails from the "Installation Issues & Problems" mailing list. I am still at loss as to what the problem could be. Thanks for any help you can give me. Louis Hinman, New York City