BBcode and url/image tag problem

Hi,
I’m using this BBcode plugin (http://wordpress.org/extend/plugins/bbcode/) on my site. I have one problem. When I make bbcode like this:
[url=http://www.domain.com/image.jpg][img]www.http://domain.com/anotherimage.jpg%5B/img%5D%5B/img%5D it shows image anotherimage.jpg, but when I click on that image it opens http://mysiteurl.com/=http://www.domain.com/image.jpg if it is on main page or if it is in post http://mysiteurl.com/post-name/=http://www.domain.com/image.jpg
Have someone solution for this?
Thank you.