L.A.
I would also tell you to get rid of the potty chair and stick with the kid toilet rings that fit on top of the toilet and let him pick one out that he likes. Also, if he has character underwear tell him that Bob the Builder or Nemo or whoever doesn't like to be pooped on. We also did a poop chart and every time he went poop he got a sticker and after 15 times he would get a prize, something little is all I did like a matchbox car or coloring book etc.. It worked well for my son and it helped him counting too because he could say three more poops and I get a prize, also we've got books in there for him to look at like his dad has magazines and I found out that he does better if I am not in there. So, he needs help getting on the toilet I give him a book he goes, we wipe and wash and then do the sticker chart. You'll get there, good luck.