Magento可配置产品在多商店网站的前端缺货

I have added some configurable product and in backend inventory setting is "in stock" but in front end that product is showing as a out of stock. i have cleared cache and re-indexing is also done but still it is showing as a "out of stock". Please help why it is happening like this and how to resolve this.

If you are using a multi store website please make sure that all the associated simple products are associated with the same store as the configurable product itself.

Screenshot

Hina,for concept of configurable product , frontend configurable product stock is depending on it child products stock(qty and is_stock).If any of one child product(means simple product )of configurable

stock is in stock and  configurable product attribute is_in_stock is in stock then frontend  stock status is in stock  

More reference:

http://www.magentocommerce.com/knowledge-base/entry/creating-a-configurable-product

http://www.sitepoint.com/adding-configurable-products-magento-ecommerce-site/