Hi, I feel your pain, my son is 6 and 1/2 and still wears pull ups due to having a Bm problem and the potty. He was diagnosed with Aspergers syndrome.He to will pee on the potty like he has been doing for a couple years, but the BM's are a different issue. After taking him to a specialist, he was constipated and had encropesis they call it and he would "leak" three or more times a day. That is where his BM would go around the mass of back up in his intestines instead of all of it coming out so in turn his muscles stretched to the point where he could not feel the urge to even go BM. Last summer we had to clean him out with daily enemas and keep him cleaned out by using Miralax and try getting him on a regular schedule. We had little success till after Christmas where all the focus was on his potty training then he did start going regularly right before his bath every night. We do have to watch if he does not go or does not go a lot one or two nights in a row, then he might need something to help himn a little. It was going well for a while, where I was comfortable sending him to school in underwear. Unfortunately, being Aspergers syndrome, he had a major change at school and he has not been going Bm on the potty at all again, so we do need to start the process over again with getting hom back on a routine. I feel your pain, it is hard, but it will work out eventually. Hope this was of some help.
I am a 31 year old mom of three children, a 6 1/2 year old with Aspergers, a 3 1/2 year old with hemophilia, and a 2 1/2 year old with asthma. Married to a great guy for 8 years.