Chat script in Networking

Hi, I took the chat code from Unity's Networking demo Project and put it into my project. I replaced missing GUI and scripts When I run the game, I get the connection stuff in the up-left corner............ok! I get the "Display chat" button in the lower-right corner...ok! Once I press "Display chat", A chat window comes up.........ok! But I don't have anything to type in, no box or form, I can't send a message!