domain mapping and addon mapped domain login not working

When I go to n2rga.com the site loads fine and I can see all links posts on the site when I goto login I'm present with n2rga.com/wp-login.php.
all go so far.
I put in my username(callsign) and password and nothing like I put in the wrong password.
I disabled all the plugins and same problem.
I cleared cookies on each try even tried different Browsers Maxthon, firefox, IE10(yuck), Google. after the login the url is
http://n2rga.com/wp-login.php?redirect_to=http%3A%2F%2Fn2rga.hamradiostop.com%2Fwp-admin%2F&reauth=1

Each time I can't login.
If I disable domain mapping and login with n2rga.hamradiostop.com it Logs in immediately