Well, my 2 cents would be this, given the little info that you've provided. There could be a few things going on. Could be the cage is too cool, could be there is a lot of commotion that goes on around the snake that's not allowing it to really settle down, or it could just not be ready yet. Take a look at it's body shape.....if it really doesnt look like it's in bad shape, then dont sweat it too much yet. The snake just might know whats good for itself. Give it another week or so before really hitting the panic button. Make sure it's got a hide box (supposedly copperheads like to have a nice secure hiding spot)and water to drink, and just wait it out for a little longer. Keep us all updated in a week or so, and we'll take it from there.