You might have to stay in the Houston area for 2 to 4 weeks after the transplant. After that, you will need to return to Houston every 3 months for the first year, then every 6 months for 5 years. Three months after the transplant, bone marrow exams and other tests will be done. If you show evidence of disease, you will receive another cycle of Campath -1H three times a week for 4-12 weeks. Patients will be taken off study if the disease gets worse or intolerable side effects occur.