Domain Mapping Plugin: Blogs can't save domain thatey want to map

I have a problem with the Domain Mapping Plug in
It will not except the url for the domain.
And by the way this is on a Totally New install

I entered the url with out the www. and the page just reloads and thats it.
I checked the Database and
the table wp_domain_map is there and the Columns
id
blog_id
domain
active
are all there and empty