Hvorfor smides data ike i db

Hvorfor kommer dataene ikke i db'en ??

<?
    mysql_connect("localhost","*****","******");
    mysql_select_db("*******");
   
    $dato = date("YmdHis");
    if (isset($_POST['navn']) && isset($_POST['mail']) && isset($_POST['besked'])){
    $insertSQL = "insert into gaestebog (navn, mail, besked)
    values ('$_POST[navn]', '$_POST[mail]', '$_POST[besked])";
    mysql_query($insertSQL);
    $status = 1;
    }
   
        switch($status) {
        case 1:
        echo "Data gemt";
       
        break;
          default:
?>

<body>

<p align="center">&nbsp;</p>

<form name="form1" method="post" action="<? $_SERVER['PHP_SELF'] ?>">
<p align="center">
  <input name="navn" type="text" onfocus="if(this.value==this.defaultValue)this.value='';" onblur="if(this.value=='')this.value=this.defaultValue;" value="Navn" maxlength="30">
  <input name="mail" type="text" onfocus="if(this.value==this.defaultValue)this.value='';" onblur="if(this.value=='')this.value=this.defaultValue;" value="Mail" maxlength="30">
</p>
<p align="center">
  <textarea name="besked" cols="34" rows="5" onfocus="if(this.value==this.defaultValue)this.value='';" onblur="if(this.value=='')this.value=this.defaultValue;">Besked</textarea>
</p>
<p align="center">
  <input type="submit" name="Submit" value="Gem">
</p>
</form>
</body>
</html>
<?
        break;
        }
?>