[Mediawiki-l] New install problem on Win2K

[Jay Blanchard]

Warning: dl() [function.dl]: Not supported in multithreaded Web servers -
use extension=mysql.so in your php.ini in
E:\www\webroot\wiki\install-utils.inc on line 17
Could not load MySQL driver! Please compile php --with-mysql or install the
mysql.so module. 

I have MySQL and PHP running on this box already;

Apache 2.0
PHP 5.0.5
MySQL 4.1.14

Can someone give me shove in the right direction here? Thanks!