I agree with Neil....
You just got it on Friday and tried to fed it on Monday? That's only three days after putting this tiny thing into a new home! No wonder it hasn't eaten!
Most snakes are fine eaters and don't get disturbed by moving etc. But lots of hatchling are disturbed by this and its recomended that you give a new snake at least a *week* before trying to fed it.
I would leave this hatchling alone, except for checking on temps and giving fresh water every couple days, for an *entire week* starting today. Next Tuesday, try again. It needs time to be alone and rest.
bmm