Your UL/LI nesting is a bit screwed up. UL’s are closed and new ones are opened when they shouldn’t. Most importantly, secondary ULs need to be WITHIN LI’s (so don’t close a LI before the second-level list is finished).
Make sure the structure is like this:
You have an AppleID.
Is up to date (5.0.1 at the time of writing this article).
Is connected to your network via Ethernet or WiFi.
Has Home Sharing is enabled.
You have a computer (Windows or Mac) that:
Can act as an “iTunes Server”.
Uses the same AppleID as your AppleTV.
Has Home Sharing enabled.
Is connected to the same network as your AppleTV.
You have Microsoft PowerPoint 2011 (Mac) installed.