extensions problem

Hi

I'm trying to get the extensions working on my server: IIS 6 with PHP 4.3.1 (CGI/FastCGI). PHP is included in my windows path (c:php).
Edited php.ini in c:windows (tried almost everything ==> c:/PHP/ext, c:/PHP/extension, c:/PHP/ext/, c:/PHP/extension/, ./, with and without quotes, removed the ; in front of de .dll) and restarted IIS.

When I open a php page it won't load en i get an error in the application log: "The script started from the URL '/info.php' with parameters '' has not responded within the configured timeout period. The HTTP server is terminating the script."

When I put back the ; in front of the extension everything turns back to normal. Changes to the extension_dir path show up in phpinfo ...

Can someone help me, i'm going absolutely mad here ...