If I change the button1Pin and button2Pin number to some other numbers, and then I touch that little circles around Lilypad, it seems have some responses. However, I don't see any law from it, it is kind of random to me. Because even I just put my Lilypad on a flat table, it will also type 'A', but if I touch some specific circle, it will type more 'A' or 'D'.
No probs friend 
, thank you. I think I'll just wait for someone else to see if they know about this problem.