He's more than likely a wild caught. Did you end up adjusting his basking temps? What are you offering as feeders? A lot of the time wild caught jacksons don't recognize other more common feeders in captivity. Is he pooping regularly? If not he is not eating, if he is then he is eating and enough. But if he's not you may need to not offer just crickets and whatever else you offering. Most wild jacksons are attracted more to flying insects, so I would get some spikes and make some flies happen for him.