She's probably still going through an adjustment period, though it's important to ensure all her needs are being met.

What size of an enclosure is she in?
How are you monitoring the temps, and what are they on the hot / cool sides?
Does she have small, tight hides available at both ends of the enclosure?

Have you been messing around with her at all while she tries to get acclimated? I try and make it a point to not mess with any new snakes (beyond the necessary handling for cage cleaning and maintenance) until they're eager feeders. At least eaten 3 times in a row, at a bare minimum. Your mileage may vary, however.

Depending on how old / big she is, I wouldn't be overly concerned about two weeks. How big is she?

I'm sure there's a few more things other people will throw in!