Hi,
Reading your post everything in his husbandry has changed.
New enclosure, new type of prey and new status of prey from live to F/T.
Either one of those has been known to cause refusals so I wouldn't be worried ( especially as he has eaten ).
Just do your best to reduce stress like no handling or sitting staring at him ( hard to do with a new pet I know)
Wait 5 - 7 days and offer his next meal the same way.
del