Hello. I'm new to this forum and just saw your post. I know it's a month old but I have the same problem and I got the same book you mentioned. My son is almost 4 and 1/2. His problem is he won't wear anything different than his diaper, the book has a lot of good advice on that. We are actually able to get him to wear underwear under his diaper for short periods of time (gradually increasing the amount of time). I also use the scheduled routine, which works well but honestly is difficult to maintain that for several weeks so it's been very slow going. We just can't stay home for several weeks. The book says it can take up to 21 days. If your daughter does well for 2 weeks you might just have to keep on trying to get her over that hump. Plus, if she is having accidents maybe she really can't tell she needs to go or can,t tell until it's too late-because of the sensory issues. I think that is my son's problem too (other than the tactile issues of not wanting a pullup-too itchy he says). Plus, he has week trunk/core muscles which also makes potty training difficult. I think OT will help you very much. We just started OT ourselves. It's so good to hear that others have the same issue, before I knew that I thought I was a bad mother and didn't do a good enough job working on this with him when he was younger.

Good luck!