Potty Training the Strong Willed Child, Part 2

Yesterday was a bad day for potty training. In the morning, she pooped in her new underwear. Then she pooped twice in her pull-ups. Just getting her to sit on the potty is a major pain! In the afternoon, we battled wills for 45 minutes while she begged to go outside and I kept telling her to sit on the potty first and then she could go outside. When she sits on the potty and actually goes and then puts her reward stickers on the chart, it's a beautiful thing. If only she was always so agreeable!!!
Maybe I waited too long and she's too set in her ways. Hindsight is always 20/20! But saying I waited too long doesn't help in the present. What do I do now? Does anyone know how to potty-train the strong willed child??
By the way, I checked out the book, "The Strong Willed Child," by James Dobson. If this book helps me to parent her better, then I can train her to use the potty. Know what I mean?
Your prayers and advice are appreciated! (Just don't tell me that your kids were trained at 18 months. That's depressing!)

Potty Training the Strong-Willed Child

I stepped up the potty training a knotch with Allison, our 3 1/2 year old this past weekend. I put her on the potty every hour, bought her The Little Mermaid underwear (her favorite character) and had her put stickers on a potty chart. She stayed dry all day yesterday and even pooped in the potty last night before bed. She pooped in her underwear this morning, but I made her stand up while I cleaned it up. No more lying down on the floor while her bottom gets wiped. We still have a ways to go but after 9 months of no progress, I feel more encouraged! I keep reminding myself that she and I need to work as a TEAM!! Being consistent with this is exhausting, and it's embarrasing to have a 3 1/2 year old not potty trained yet. Maybe later I'll post a picture of her in the new underwear she's so excited about.