Hi ctmti,
You'll need to add the new one to the domain listing on your kit in order for the fonts to work on the live site.
To add domains, go to https://typekit.com/account/kits and launch your Kit Editor. Click Kit Settings in the upper right corner and add your domain to the domains field, then save your settings. When you're done, republish your kit.
The fonts will be available within a few minutes of republishing.
I hope that this helps; let me know if you have any other questions! Best,
-- liz