Baby bed doesn't work

Hi, I created a new baby bed foe newborns but it doesn't work. When I place the bed everything is fine, but when my Sim goes into labor and gives birth, the baby disappears with the cribs. You can still see the baby at the bottom of the family ad, but it's gone. Can you tell me what I'm doing wrong?

Here is the Link for my Baby bed:

Thanks for your help