I still struggle with my DD and she is 2. Mostly it is her personality, she just does not stop! It is hard for her to wind down, just like me. I find it difficult to fall asleep, so I see it as unfair to expect her to fall asleep on command. Your DD seems to be quite active as well. Even childcare comment on how it takes her awhile to wind down and they are experienced at getting kids into a good nap routine.

My DD is sensitive to certain food additives, so we have to be careful there, so you may want to check out your diet if you are still breastfeeding, and what she is eating. We have to be vary careful with yoghurts and icecreams, the additives in them are amazing.

If you haven't already check out books such "No Cry Sleep Solution" by Elizabeth Pantley and "Sleeping like a Baby" by Pinky Mckay. They give some good tips for gentle ways to help your daughter. Also check out the Dr Sears site for other tips

Have you got some sort of night time ritual in place? You may find it helpful to start one if you do not have on already, or you may just need to tweak it. Rituals only sometimes work for us, it depends on what her diet is like at the time. HTH