What are the dimensions of the enclosure? One possibility is that he doesn't have enough surface space, i.e. his enclosure is too small. Deep sub is very important, but for terrestrials, so is leg room.
Another possibility; temp and humidity. This sp is from the southern US, so they are used to the desert. Keeping the temp between 75-80 might be a good idea if you have a picky T, and keep the humidity fairly low. You pretty much don't ever mist their enclosures.
ONE LAST THING- does he have a hide? They like to hide under logs, etc. Maybe if you offered him an alternative hide that he couldn't destroy, he would settle in and feel safer in there. Just a thought
He could also just be a busy little guy with a lot of energy to expel