Ahhh they get you every time with their pathetic little puppy cry don't they?
Today is his first day in a new environment and he just needs to adjust. I never succeeded at the crate thing because I give in too easily . . .
Do you have a baby gate where you can put him in a confined area to sleep so that way he doesn't feel locked up but he remains safe? Also, did he fly in? When they fly they are locked up all day long in the air carrier and they don't want to get back in a crate, ya know?