A 52 grams baby should not be house in anything larger than a 15quarts tub, ideally 6 quarts would be even better
Most people experiencing problems with very young BP do so because of their husbandry.
I would recommend you to go to walmart get a 6 quart or 15 quarts tub, get (1) or (2) 6 inches plastic flowerpot saucers
,depending on which tub you pick, and setup your BP in his new enclosure.
Also get a dial thermometer/hygrometer if you don't already have one
This is a 15 quarts tub
Leave your BP alone for a week (NO HANDLING) and once a week has passed try to offer a LIVE hopper.
Remember right now the priority is to get your BP to eat so switching to f/t should be secondary and only be done when your BP is well established and eats with consistency.
The key is security and for now your enclosure does not provide the necessary security needed for your BP.