Avatars Not Showing With Addon Domain

I had the plugin working fine when I was developing my site at http://www.mangoro.co.uk/InspiredWorldMagazine but when I started using the addon domain http://www.inspiredworldmagazine.com the avatars stopped showing. Please help as I launch the site in 1 week! You can see here: http://inspiredworldmagazine.com/regular-contributors-staff/

The only avatar showing is the user with a Gravatar!

Thanks

http://wordpress.org/extend/plugins/user-avatar/