 If you are able to take part in this study, you will receive high-dose chemotherapy for 4 days. You will receive fludarabine over about 30 minutes daily as an intravenous IV--through a needle in your vein infusion . You will also receive busulfan over 3 hours by IV once a day. About 2 days later, you will be given the infusion of the alloreactive NK cells by IV. Patients will receive one of 3 dose levels. Some patients will receive interleukin-2 daily for 4 days to enhance the function of the NK cells. 