Mysql – PDO Disabled in PHP… how to enable it

Sorry I'm still a bit of a novice with dedicated hosting. Anyway, we have a dedicated server running cPanel and WHM. I have full terminal access and all that.

Basically I've tried to install Chive to a user on my server's account. Unfortunately whenever I login with any details, I get the following error:

Internal Server Error

include(PDO.php) [<a href='function.include'>function.include</a>]:

failed to open stream: No such file or
directory

An internal error occurred while the Web server was processing your

request. Please contact the webmaster
to report this problem.

Thank you.

My research shows from that --disable-pdo is in the Configure Command list. What I want to know is how can I change this and turn it off? I have these two lines at the end of my php.ini file:

extension=pdo.so
extension=pdo_mysql.so

(There's a linebreak between them but SF isn't showing it…)

But still it's not working. I can't find anywhere in php.ini that defines –disable-pdo – so where do I change this?

Thanks!

Jack