Images uploading failure

I used the header images in the csv and under the header I added urls of the images. I’m sure the urls are correct. But after I imported the csv, I can’t find any images in the product pages. Why did this happen?

And I also used the header stock_status. I added In Stock for some products and Out of Stock for other products in this column. But after I imported the csv, all of the products are out of stock. Anything wrong? What should I write in the csv for this column?

http://ww.wp.xz.cn/plugins/woocommerce-csvimport/