Installing php_pgsql.dll to Apache - this is unreal

Hi, I am trying now for almost 2 hours to get this working: I had Apache and PHP with modules installed as CGI (also tryed as module). Now I added extension (in php.ini) php_pgsql.dll and also installed postgreSQL. And it shows me error when starting apache: "module could not be found". The path is 100% ok, I also tryed 3 different php_pgsql.dll and one shown different error dialog with that i need to change some settings in postgre (but that was probably caused because that DLL file was for PHP 4, and I have PHP 5 - the newest version). Please help! Maritn