To verify... you just got him 3 days ago? 

Give it some time to adjust to it's new home. It could just be stressed from everything. I would try again in a week with a FT hopper and maybe brain it if you feel it needs to be. Braining helped mine get started on feeding.

yes 3 days the only reason i wanted to feed him so soon is cause he looks really thin sorry i don

dont have a camera at the moment or i would show you guys.

If you have only had him for three days there is still a chance he may be settling in. Since I can not see him, I am unsure what your definition of "really thin" is, and if it is urgent or not to get him to eat right away. I would not stress him by trying to force him to eat so soon after re-locating. Hopefully that is all it is, and your little guy should eat in no time. Good luck. :)

I would give him a full week since you got him before trying to feed him again.  I know with stubborn baby corn snakes braining the pinky (cutting the head open) helps sometimes (they like the smell of brains).  Even if he is really thin he should be fine for a week, and feeding him while he's stressed might just make him regurgatate.  You can also try jiggling the pinky in front of him (using tongs), worked like a charm with my snake when he was a baby.

it takes time your boa will come around all three of my snake at first where nervous about feeding once they settle in he will star to feed two of my snakes eat outside of there encloser and my other dumeril will not eat unless i feed him inside of hes encloser but sinse i do that he eats like a champ good luck and be patient it will happen

thanks guys i posted some pics of him if you want to check him out and see how big he is. he only weighs 45 grams

give it time, it'll feed.  id give it 2 weeks acclimation period, but 1 week is fine too i guess.

I will agree with everyone about letting him chill out a bit and get use to his new place but he is tiny,  Has the snake eaten before from the breeder?  To me 45 grams is small at 2 months of age!!!

i let him chill a couple more days and sure enough he ate 1 fuzzy mouse i just hope he stays eating cause he is so small the breeder told me he lets all his boas shed and eat twice before he sells them but it looks like that might be all he ate.

The last litter I had the runt was 69 grams at birth. As long as he eats for you and seems healthy then that sounds great. Keep us updated. He is a pretty little hypo!