MySQL empty row

Until some time I could make a new empty line in mysql with this query: INSERT INTO ".$_SESSION['type']."() VALUES () where $_SESSION['type'] was the table I wanted to use but now I get an error and since I use DB I just get this error INSERT INTO authors() VALUES () *Warning*: Cannot modify header information - headers already sent by (output started at /usr/local/ftp/faps/public_html/pubDB/edit/newline.php:9) in */usr/local/ftp/faps/public_html/pubDB/edit/newline.php* on line *19 *This is the file <?php include "./checkuser.php"; include "../modules/connect.php"; array_pop($_REQUEST); $query = "INSERT INTO ".$_SESSION['type']."() VALUES ()"; $res =& $db->query($query); //Always check that result is not an error if (DB::isError($res)) {

       die($res->getMessage());

} include "../modules/disconnect.php"; header ("Location: ./edit.php?".$_SESSION['stayurl']); ?> Howcome does line nine: $res =& $db->query($query); write anything??