Facetime Calls using the Same Apple ID

I have a macbook pro and i've used it to make facetime calls to my ipad (that my daughter has) before using the same apple id login for both devices. Since i updated her ipad i haven't been able to make a call from my macbook to the ipad. Does anyone know if there are specific settings the devices have to be on to allow me to make calls between them using the same ID. My daughter is 4, so she doesn't have her own apple id.