Patients who had systemic cytotoxic chemotherapy, immunotherapy, recombinant anti-CD22 immunotoxin (ie, CAT-8015, BL22, or LMB-2) or systemic steroid (with the exception of stable doses of Prednisone less than or equal to 20 mg/day) treatment within 4 weeks of enrollment. Patients receiving a limited number of doses (less than 5) of steroid for non-treatment reasons (eg, allergy prophylaxis connected with medical testing) may not receive any steroid within one week of enrollment and may not have had any evidence of disease response to steroid. Subjects who are receiving steroids for other conditions (e.g., autoimmune disorders) are eligible, as long as there is no increase in the dose or change in steroid type within 1 week of treatment. Subjects who are using a chronic steroid must wait for 4 weeks before starting the trial.