Previous/Next Post Links Not Working

My blog is hosted at http://www.myfotographa.com/Blog. When I click on previous posts I get a 404 error and the page it tries to pull up is http://www.myfotographa.com/Blog/Blog/?paged=2. If I delete the second /blog it brings up the second page just fine, but no customer will know to do that. It does the on all the pages when trying to navigate with previous posts or next post.

PLEASE! Can anyone help!? Where can I tell it not to put the second /blog in the link!??