how to designate an admin site

Hi Folks,

I am using Pro Sites, and Multi-Domains for Multisite.

I am using two domains for Multisite, example1.com, and example2.com.

example1.com is where Wordpress was installed, and I don't get any Pro Site membership level notifications.

I have just created http://www.example2.com, but this site receive a notice: "You have 100 days left in your Pro free trial. Checkout now to prevent losing Pro features".

How do I designate http://www.example2.com as being outside of Pro Site membership levels?, or at least a Pro Site?

Thanks,
Steve.