Make sure she's not in shed mode first of all. Then make sure her environment and thus her body temp falls between 84 and 90 degrees. A cold snake rarely has an appetite.
Next, begin with a freshly pre-killed rat so it registers as "warm and living" to her heat sensing abilities. Then, when you offer it to her make sure it is level with her head or under this level. Sometimes food hanging from above can pose a threat to them. Then, while offering her the food at a level height reach out with a finger and rub her side and or back softly, but firmly. This often stimulates a mildly defensive reaction and it gets their blood and thus their functions pumping and alert. They will often shoot forward and grab what is in front of them.
If this doesn't work try leaving the food item in the cage for several hours in pitch dark.
If that doesn't work leave a living fuzzy (just at the age where the eyes open) in with her overnight. This one rarely fails.
If none of these things work and several weeks pass you'll have to cave in and get her a mouse. They rarely ever will refuse a mouse.
Hope this helps y'all in some small way.
Our Website
-----
David Beauchemin
High End Herps.Inc
http://HighEndHerps.com