I took everything apart, and threw in the new o-ring that came in today (Thanks Carson!) and I buttoned everything back up using everyone's advice. The problem is that it is still leaking. The only thing I can think of is that the flange is no longer flat, it may have warped when I installed it the first time and now it won't seat properly. I will have to take everything apart this weekend when I have some time and see if the flange will fit flush against the head with nothing attached to it.
I really hate the smell of coolant!