Like the previous poster said, monitors don't like being moved.
Give it about a week and he'll be out and about. Until then, also like the previous poster said, put the food on the cold side.
But, on an alternate note, if it was healthy and had good weight when you got it, going a few days without food isn't going to be a big deal for it. It's not ideal, but it's also not going to faze it.
Sit back and wait!
~jen
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"We call them dumb animals, and so they are, for they cannot tell us how they feel, but they do not suffer less because they have no words."
- Anna Sewell (1820-1878)