FD Table - Cluster error

Hi Guys,

I have only use your table object once and never with this type... could you have a look, i just wrote it from scratch dho :P

public function onRegisterAfterSave(&$post, &$user)
{
$desc = $this->params->get('default');

$group = Foundry::table('Cluster');

$group->category_id = '4';
$group->cluster_type = 'group';
$group->creator_type = 'user';
$group->creator_uid = $user->id;
$group->title = $post['name'];
$group->description = $desc;
$group->alias = $post['permalink'];
$group->target_id = $usertoassign;
$group->state = 1;
$group->featured = 1;
$group->type = 3;
$group->parent_id = 0;
$a=JFactory::getDate()->toSql();
$group->created = $a;

$group->store();

$data = array('permalink' => $post['permalink']);
$table = Foundry::table('Cluster');
$table->load($data);

$cluster = Foundry::table('ClusterNode');

$cluster->cluster_id = $table->id;
$cluster->uid = $user->id;
$cluster->type = 'user';
$cluster->created = $a;
$cluster->state = 1;
$cluster->owner = 1;
$cluster->admin = 1;
$cluster->invited_by = 0;

$cluster->store();
}