I was so spoiled with my first son, he was brilliant at potty training and never had an accident. Then came #2. We tried at 2 1/2 and ended up waiting until he was 3. He didn't care if he had poopy underwear, that was the problem. I had used a sticker chart for my first and it worked great. #2 didn't care about stickers, so I thought long and hard and ended up on pennies. That child loved money (still does). I also didn't do the asking if he had to go potty thing in the begining, they might not or they might not want to, so I just took him. I was babysitting at the time and training another, so every 1/2 hour we made a trip to the potty until they went. It was a very slow and messy process, but with persistance (on my part) it paid off. He was potty trained within 3 months. Good luck to you and don't give up!