Almost all situations like the one you are facing can be managed by (a) having the child sleep in the crib, not in a bed, and (b) biting the bullet and leaving the child in the crib at bedtime, regardless of the child's response. In relatively rare instances children display neurological or other physical/medical conditions that interfere with sleep. I assume you've discussed this with your daughter's pediatrician; if not, do so. It wouldn't hurt to ask for a referral to a pediatric sleep disorder clinic (available at specialty pediatric hospitals). When you mention that "it takes 2 hours to get her to sleep", what do you mean? What actually occurs?