unable to load dynamic library'c:\php\php_pgsql.dll'이라구 경고 메세지가 뜨고 확인은 클릭하면

X-Powered-By: PHP/4.1.1 Content-type: text/html

Fatal error: Call to undefined function: pg_connect() in c:\program files\apache group\apache\htdocs\N.php on line 2

이런 에러가 뜨네요.