iTunes library access not consistent I have an iPhone 4s, iPad2, and AppleTV3
My problem is that, my iTunes library on my PC doesn't consistently appear over all my devices (on my phone and ipad, I am referring to Apple's Remote app).  Sometimes, my itunes library will be visible by my apple TV and not my phone, or not my ipad, and vice versa. It's very random how some devices can see it and some cant. Even more strange, sometimes, a device will see it, and connect, and control it, but then shortly after, it's as if a connection is severed. And the device can no longer see my library. Any ideas why this would be? Here are some things to help you form answers.
- Everything is on the same network.
- They are all as up to date as possible.
- it DOES work, it just isn't always working.
I have sometimes have similar issues accessing iTunes libraries from AppleTVs. Sometimes I have better luck using a WiFi rather than Ethernet connection.

Also, have you tried assigning your AppleTVs static IP addresses (assuming you use DHCP?)