internet sharing

i'm new to the forum and new to mac. i just got my new blackbook 2 days ago. On my previous laptop i was able to share the connection from the wireless network to the ethernet port. I know enough to go the the control panel, click on sharing, scroll down the internet sharing, and check the ethernet port. The first time i didn't click the lock and then i saw the lock icon, but it doesn't seem to make a difference. Am i missing something?

 

nevermind i just figured it out.