Saint Bernard - St. Bernard Question

My husband and I adopted a 5 year saint (Whiskey) for some reason he will not come into the main...

My husband and I adopted a 5 year saint (Whiskey) for some reason he will not come into the main house. He will go into the garage and into the room off of the garage which we have now deemed his room (laundry room) There is a door in his room leading to the kitchen which we leave open all day and night. He will only put his front paws in the kitchen and if someone sees him he turns around and runs. I've tried putting his food in the kitchen but he still won't come in. Any sugestions would be much appreciated!