I am SO mad right now! >.>
I figured it out, when you do train it will tell you to select defense or offense. Then I thought I just selected how much to train and then hit train. Well it turns out you can train endurance, agility, and enlightenment. Btw, I had 830 defense and it was doing NOTHING. I am SO mad. >.<
I just made a new account, didn't want to waste all that defense even though I was lvl 4.
@ccliu: Endurance helps keep your enemy's attacks low. Agility helps you dodge there attack, making there attack zero.