Dog Peeing and Pooping Inside?

We moved recently and ever since, my dog has been whimpering and scratching at the door and wants to be outside all the time. He does not want to go in the backyard, but outside on the street as I live on a gated community. He has been peeing inside and pooping, as well, with people at home and it gets worse if no one is home. He already marked all around the house and it's not that type of pee it's the regular one. He has been well trained to go to the backyard to pee and poo ever since he was a puppy. Now he has stopped eating. I'm worried; what can be causing this?

By Andus