Sessions and pg_connect

I'm using PostreSql as an backend database. While I was trying to use sessions I've discovered this strange behaviour When I'am using the following snipet I cannot make sessions work. The session file is created but it has a zero lenght. //---------sec.php---------------// session_start(); print($counter); $counter++; session_register("counter"); //--------end sec.php------------// If I'am adding an pg_connect call to a local database I'am able to use sessions. //---------sec2.php---------------// $con=pg_connect("host=localhost dbname=d4a user=root"); session_start(); print($counter); $counter++; session_register("counter"); //--------end sec2.php------------// Any one has any ideea why this behavoiur occured ? Ovidiu EFTIMIE