Broken Uploading Files Images

Hi, i am running WordPress 3.2.1 –
I want to change the media location to a subdomain like img.xyz.com/images

I did following steps – in media setting:
1) in “Store uploads in this folder” text field – images.
2) in Full URL path to files text field – http://img.xyz.com

3)created a new post and inserted images, but images are broken.

the image path must be img.xyz.com/images/2011/08/abc.jpg but it is showing http://img.xyz.com/2011/08/abc.jpg.

i ftp browse the img.xyz.com and found no folder or file at all.

i have published just 2 post, so i have big scope to change anything.

Need help !!!

Thanks