How do I set my TV so that another TV sees me as online?

ChurchTreas

I'm a church treasurer. I have TeamViewer on my home computer. Just installed it on this new laptop to use at church. I must have screwed up a setting somewhere. The new church machine can see and remotely run my home machine. But my home machine says that the church machine is offline. At the moment they're both open side by side. What have I done rong and how do I fix it?