Some good advice already given but I'll drop my 2 cents in as well.
You said that you just this snake a little over a week ago and you've tried feeding several times. Odds are the snake is stressed from moving into a new enclosure, getting mailed if you had it shipped, being in a new environment, etc etc. You have to give it time to settle in and your multiple feeding attempts in a short period aren't helping with that.
As mentioned already, take a break, and give it a week to settle in, then try feeding again. Also as Gerguera said, more information about your snake and your enclosure can help us narrow down the issue and maybe offer some husbandry advice to get and keep your new BP eating.