PDO installed but somehow not working

Hey Guys, i guess Piwik is great, but for some reason i cannot install it.
Everytime i get the "You need to enable the PDO and PDO_MYSQL extensions in your php.ini file. " error.
I looked for solutions in the web and called my hoster. He told me that PDO is installed.
My PHP Version is 5.2.8 and my phpinfo() tells me:
PDO support ->enabled
PDO drivers -> sqlite2, sqlite

PDO Driver for SQLite 3.x ->enabled
PECL Module version -> (bundled) 1.0.1 $Id: pdo_sqlite.c,v 2007/12/31 07:20:10 sebastian Exp $
SQLite Library ->3.3.7

By now i nearly spend 15 hours looking for a solution…but so far no success.

I guess this forum is my last hope to get Piwik running.
By the way: Piwik Version ->0.2.28

So please help.
Best regards

Piwik need MySQL i think and you only installed the SQLite-Driver, you need to install the MySQL one.

It´s not my server. So i can install nothing. There are also mysql driver installed but they have nothing to do with PDO.

Can you try hacking on Db.php from http://dev.piwik.org/trac/ticket/425 ?