Some of the problem is most likely that being in there he is isolated from the rest of the family. Dogs are pack animals and they crave the attention of their family. It's going to be even worse if he's in there while ya'll are moving around the house and he can hear you. Is there a reason he was put in there to begin with? Was he a chewer or destructive? Also, is there not any way you can leave him outside on nice days? As long as he has water and shade he will be just fine. He might be more content with being able to run around outside. Hope you are able to find a solution soon.