Just give it some time, your snake might just not feel comfortable in its new home. Id try again next week. Search in the forum archives for the many posts on converting snakes from live to frozen thawed... we have given many tricks and methods which have been successfull for us.
:I have just got a 22 in red tail boa and tried to feed 7 days after the purchase and he would not eat it, he wans;t interested!!! I was warm and completely thawes and appropriate sized.....?????? Help somebody