Need help Problem with Multi Domain

Hi can you help iv installed Multi Domains however when i add a new Domain Name the use it for a new site it gives me error message >>>>>>>>>> Page Not Found - 404 Error Page
The page you are looking for (http://mysite.com/pro-sites/test/wp-admin/) is not here.

How do i fix this please see screenshot !!!

There is access to my admin for another 2 days if you wanna go in and fix ???