The anti-potty

It is time. Ok actually it is probably long over due. I am trying to potty train Caibo. We have been trying here and there for quite a while, but we have finally decided to just do it. At this point Caibo's new title is the anti-potty. We will take him in, after we ask him to go and he adimently declares, "I do not go potty." We spend the next 15 minutes arguing with him about how he doesn't go potty. We can usually get him to go enough to get the "good job", but he will never finish. 5 minutes after he leaves the bathroom he will go. It's so frustrating!! Anyways, if any of you have any pointers on training the impossible child please share. I need all the help I can get.