your not inadequate at all, this is simply an area where she has control and she knows it, and like any kid, at any age, they want to obtain and maintain control wherever they can. My kids were the same way, my son didn't start potty training until his 3rd birthday, (after a year of trying and failing), I'd finally had enough and put my foot down. i didn't force him, I simply put him in a situation where he didn't have a choice, either he'd use the potty or he'd have to pee on himself and be uncomfortable until he could change his clothes, he caught on to that very quickly. I allowed him to wear a pull up at night and that was it. Once I started doing that, he was fully potty trained within a month. Now, mind you, there will be A LOT of extra laundry for a little while with this method, but it is so worth it. Since I already had the technique figured out with my son, I did the same with my daughter, once she started showing interest, I switched her straight to underwear as well, and she wavered a bit, she did really well, then regressed, then picked up again, but I never gave in. She is 2 1/2 now and fully potty trained. I actually had a harder time with the daycare then the kids, I had to lay in to them a couple of times for putting diapers on the kids without my permission, I made it clear that the extra diapers that were there were ONLY for when the clean clothes were gone and not before, NO exceptions. It can be challenging to do this method at first, especially if your out and about a lot like me, I had to always make sure I had extra clothes in the car for the kids and a pack of wipes (and I can't even begin to count how many pairs of underwear I had to throw away due to poop accidents). Its effective though as it makes the kid slightly uncomfortable and they don't like the way it feels, don't bargain with her to go potty and don't ask her, if you do that, you are giving her a choice, which gives her the power. I would simply tell my kids, its time to go potty, its ok if you can't go right now, but you have to sit on the potty regardless, and if they had an accident, even though the duty was already done, I would still make them sit on the potty right afterward and explain to them that if they have to pee or poop, this is where they need to go to do it. Just don't reprimand for accidents, that will only cause a set back, I never really even commented on it, I would just go in and change them, then have them sit on the potty. This method doesn't work for everyone, but its quick and effective. Good luck.