Help with PDO Sqlite plugin!!!!

Hi I need help to install wordpress with sqlite, I tried the pdo plugin but don’t work! It say that there’s an error with the connection with the pdo extension, so I’ve created a script with the php_info() function to see what extensions are installed on my hosting and there’s the pdo extension plus the support for sqlite2 drivers

How can I solve this problem?
Thanks
P.S. Sorry if my english is bad ?? (I’m italian)