Why can't I join servers in Minecraft pe?

I have version 0.8.1 of Minecraft pocket edition. However, when I try to play some of the Hunger games servers, it keeps saying it could not connect to the world. I enter in the right IP and the lifeboat one works but not the others. Why do the other ones not work? How can I make my friend join me when playing the lifeboat Hunger games? And what is the server name, IP, and Port for Hyplex hunger games? It seems like a lot but if you answer all three questions, I will give you 10 points.