php_pdo_sqlite_external.dll question

Hello, I've donwloaded the php_pdo_sqlite_external.dll and I'm trying to use external sqilte3.dll library, but it seems not working, here is what I've done, 1- add php_pdo_sqlite_external.dll to the extension directory and also to the php.ini 2- removed php_pdo_sqlite.dll from the extension, and commented it out in the php.ini Added sqlite3.dll to the root and extension directory, but it seems not working, does anyone have any ideas of suggestions, Thanks very much for your time,