cannot enter delivery information while check-out an automatic created product

Hi folks,

on my website I´ve got a self-developed Module to generate card-games. When you hav finished creating a game, I´m using node_save() to save it as a product node, then I add the node to the users cart, and redirect him to cart. When I now want to checkout, the delivery information and the calculate shipping fieldset are not displayed on checkout page.

This ist the funktion that creates the new product:

function cardgenerator_order_form_submit($form, &$form_state) {
	global $user;
	
	$sku	= 'UG-' . sprintf('%08d', $_POST['user_game_id']);
	
	if (!$nid = _cardgenerator_uc_product_exists($sku)) {
		$taxonomy			= taxonomy_get_term_by_name('Kartenspiele');
		$product			= new stdClass();
		$product->type		= 'product';
		$product->uid		= $user->uid;
		$product->taxonomy	= $taxonomy;
		$product->model		= $sku;
		$product->title		= _get_game_title($form_state['values']['user_game_id']);
		$product->sell_price	= 14.95;
		$product->weight_units	= 'kg';
		$product->length_units	= 'cm';
		$product->pkg_qty	= 1;
		$product->default_qty	= 1;
		$product->shippable	= 1;
		$product->language	= 'de';
		$product->comment	= 2;
		$product->promote	= 1;
		
		node_save($product);
		$nid	= $product->nid;
	}
	
	uc_cart_add_item($nid);
}

The database entry in {uc_products} seems to be right (attached file). Has anybody an idea how to solve the problem?

Greets
dops