Michelle,

Try not to worry about it too much at the moment she will do it when she is ready. What age does she start pre-school ?

I had the same trouble with Kimberley and then one day she came home from DH's cousins and she did it all on her own and never wore a nappy during the day from then. She was just over 3 when she did it.
Does she get a chance to watch other kids her own age do it ?
As that is what i think happened with Kimberley as she was staying with a 4 year old that was toilet trained. She never really used the potty just the toilet.