No, I don't want to...

Alexis has been potty trained (pee) since a few weeks prior to Christmas... one day she just decided she no longer wanted to wear a diaper... well we are STILL struggling with poop! She waits until bed time and then goes after we put a diaper on her at bedtime! OR even with underwear on at nap she poops... stinker! We have tried EVERYTHING... offering sleep overs, slurpees, barbie's, toys, and on the flip side we have taken things away and nothing is working! If I say to her... Alexis... if you put your poo-poo in the potty Mommy will take you to the store and get a Barbie for you... her reply is ALWAYS... "No, I don't want to." Really!?!?!?!? This crazy girl is going to be the death of me! :)