Doctrine_Connection_Exception [ 0 ]: Couldn’t locate driver

To avoid unnecessary comments, I have searched days (google and SO) for a solution but found none that solves my problem, i only ask SO as a last option.
One such solution is to enable
extension=php_mysql.dll
extension=php_pdo_mysql.dll
in httpd.conf
I have also tried reinstalling PHP and apache.
All of this to no avail, the error message: “Doctrine_Connection_Exception [ 0 ]: Couldn’t locate driver named mysql” still shows up. I strongly refuse to use WAMP or XAMPP and will only resort to those packages if my deadline is near and if i do not have a plausible solution.
This is my setup:
Windows 7 64 bit
Apache 2.2.17
PHP 5.3.4
Kohana 3.0.1
Doctrine 1.2.3
These are my installation directories:
PHP – “C:\Program Files\Developer tools\Servers\PHP”
Apache – “C:\Program Files\Developer tools\Servers\Apache”
I had this very same setup before with a Windows 7 32 bit and everything works. same installation procedures, same directories, everything except for the OS architecture.
Thanks in advance!