Nap time early riser/screamer-Help

[daycare woman]

Hi ladies
So I've never had a daycare child not sleep the full 2 - 2 1/2 hours till now. She is 17 months goes down fine but wakes at 2- 2:15 and cries and screams and cries and screams, its driving me bonkers, wakes the other children occasionally. I go in and say stop crying nap time, cover, walk out and it seems to get louder! I'm not exactly sure she understands what I'm saying. But I never take her out early actually leave her till the last to get up. I will not take her out till she stops crying. I wait till that happens. Íts a bit disruptive. The child is in a room by themselves with the door closed, it helps a bit. This child is part time and an only child, I think the parents run to pick him up right away and this is what is affecting her. She seems to settle after 3-4 days with me but then gone home again and back to screaming next week. I'm really not sure its scheduling though. I was thinking of changing her room to the basement where my daycare is and I have one sleeping there now, but instead putting her down there and who cares if theres crying, no one should wake up upstairs. This is the reason I can't have kids sleeping together, I would never have a break at this rate. I would like to have her wake up and play in her bed she has a baby safe book and a baby safe toy, which ends up over board. Any suggestions? I am not giving any of my time up thats for sure!