I started my 21 month old son on N75 four days ago. I have read the book several times. The first day we had no success but I felt good that after he would wet or poop himself, he would run and sit on the potty, like he knew what to do but he was just a little late. Now he has decided he does not like the potty and will not sit there. He gets mad and stomps his feet when I tell him to go sit on it. I decided to use the bell and the gate. Today I gated him once the bell rang and told him to call me once he went in the potty. I’ve done this multiple times and instead of going in the potty, he screams, calls for me, climbs on the potty and plays with the bowl, and then he pees all over the floor. Help...?