Description:
------------
I want to run a open source website testing on my localhost..

First, I was failed to load PHP 4.3.x with Apache 2.0.x, then i switch to PHP 5.0.x (which i installed both installer and zip files) and Apache was successfully loaded.
Then i wish to use MySQL as my database system, i knew that the PHP 5 did not load the extension as well, so i did changed few lines in php.ini 

; Directory in which the loadable extensions (modules) reside.
extension_dir ="C:\PHP\ext"
&&&&&&&&&&&&&
uncomment: extension=php_mysql.dll

And when the time i restart apache 2.0, The Mysql extension was failed to load.

on the other side, i have uncomment mbstring.dll and gd2.dll ..and these 2 extensions are able to load!! 

so in my opinion, there is an error with php_mysql.dll ,
i have uploaded a reference picture into free web.

http://xfuture.freeserverhost.com/fail.JPG

and my MySQL version is 4.1.2 .

Thanks for helping and looking forward your replies.

Reproduce code:
---------------
; Directory in which the loadable extensions (modules) reside.
extension_dir ="C:\PHP\ext"
&&&&&&&&&&&&&
uncomment: extension=php_mysql.dll

Expected result:
----------------
Load Successfully