I did as instruction said here http://www.thesitewizard.com/php/install-php-5-apache-windows.shtml.
i looked at error log and there is no error but it won't parse!
Double check your AddType's?
Try swapping any <? tags for <?php tags - short tags are not always enabled on a server. If you have access to the php.ini file you can enable the use of short tags
I followed instruction in http://www.wikihow.com/Install-and-Configure-Php-5.2.5-and-Apache-2.2.8-in-Windows-Vista and in works.