Help!

<?phpif(isset($_GET['forumrub'])){      $qforumrub = mysql_query("SELECT * FROM forum_rubriker ORDER BY titlesid") or exit (mysql_error());   ?><form method="post" action="index.php?forumrub&amp;update" name="forumrub"><table border="1" cellspacing="0" cellpadding="0" bordercolor="#000000" name="rubriker"><tr><th style="padding: 4px;" >Aktiv</th><th style="padding: 4px;" >Namn</th><th style="padding: 4px;" >Rank</th></tr><?phpwhile ($sforumrub =  mysql_fetch_array($qforumrub)){?><tr><td style="padding: 4px;" ><input type="checkbox" <?php if($sforumrub['active'] == 'On'){echo "checked='checked' ";}else{ echo ""; }?> name="active" /></td><td style="padding: 4px;" ><input type="hidden" name="rubrik" value="<?php echo $sforumrub['rubrik']; ?>" /><?php echo $sforumrub['rubrik']; ?></td><td style="padding: 4px;" ><input type="hidden" name="rank" value="<?php echo $sforumrub['rank']; ?>" /><?php echo $sforumrub['rank']; ?></td><input type="hidden" name="titlesid" value="<?php echo $sforumrub['titlesid']; ?>" /></tr><?php}echo "</table><input type='submit' name='forumrub' value='Utför ändringar' /><input type='reset' value='Nollställ' name='reset' /></form>";}else if(isset($_GET['forumcat'])){echo "Forumskategorier";}else{?><h1>Administrera forumet</h1><h3><a href="?forumrub" title="Lägg till/Ta bort rubrik"> Lägg till/Ta bort rubrik</a></h3><h3><a href="?forumcat" title="Lägg till/Ta bort kategorier">Lägg till/Ta bort kategori</a></h3><h3><a href="?forumparts" title="Aktivera/Avaktivera forumsdelar">Aktivera/Avaktivera forumsdelar</a></h3><?php}//Uppdatera forumenif(isset($_GET['update'])){    $updatewhat = ("UPDATE forum_rubriker SET active = '{$_POST['active']}', rubrik = '{$_POST['rubrik']}', rank = '{$_POST['rank']}' WHERE id = '{$_POST['titlesid']}'") or exit(mysql_error());$updatethis = mysql_query($updatewhat);    header("Location: index.php?forumrub");}?>