Try ushering her to the loo every 2 hours. Keep on giving her fluids at this time to encourage peeing. Then make it every 1 hour, then 30 mins. Of course you also have to observe how Long can he/she feel peeing or defecate take that opportunity to quickly bring him or her to the toilet.Then every time that she successfully went to the loo and done her poo/pee reward her for a job well done. Expect accidental peeing, or getting her undies wet at this time. Speaking from my experience in training my asd kid. Hope it helps.