WP MU Buddypress main domain not showing up

when i type in http://www.residentroundtable.com the WP login screen appears instead of the site. if i type in a sub domain http://www.support.residenttoundtable.com i get the site as expected. under settings – writing i have discourage search engines from finding my site on both the domain and subdomain unchecked. how do i get the main domain to show up as it should when typing http://www.residentroundtable.com.

after I log in the main domain shows up just fine and everything appears to be working just fine. I have it set up as a multisite with sub domains as apposed to sub folders. it is the only site on my hosting account.