Php geht, oder doch nicht?

[Martin Gutmair]

$timestamp = time();
 $datum = date("d.m.Y - H:i",$timestamp);
         $gbname = $_POST['gbname'];
         $gbemail = $_POST['gbemail'];
         $gbpage = $_POST['gbpage'];
         $gbicq = $_POST['gbicq'];
         $gbtext = $_POST['gbtext'];
         $gbkom = $_POST['gbkom'];
         $ok = true;

if (isset($gbname)) {
           if ($gbname != "" && $gbtext != "") {
                $ok = true;
                } else {
                $ok = false;
        }
        }
        if (isset($gbname)) {
           if ($ok==true) {
  include("dbcon.php");
  mysql_select_db($dbname);
                 mysql_query("INSERT INTO gaestebuch(gbdate, gbname, gbemail, gbpage, gbicq, gbtext, gbkom)VALUES('$datum','$gbname','$gbemail','$gbpage','$gbicq','$gbtext','$gbkom')");
                 header("Location: gbindex.php");
                 }

dbcon.php geht. wenn ich passwort oder ähnliches veränder kommt die Fehlermedldung Verbindung zur db fehlgeschlagen.

Martin