3 kids(siblings) are going to be adopted but they don't want to be separated and the little girl has a dream that they get adopted by a rich family and they can't go into this one room in the house in her dream and the girl goes in and everyone in her dream gets mad at her saying its all her fault and she wakes up saying its all my fault!. I think I remember it being a disney channel movie but I'm not sure.

I'm not sure and I could be wrong but it sounds like The Chronicles of Narnia. Except it hasn't been on Disney channel yet.