These patients will not be eligible, even with a wash-out. Patients with previous or current exposure to Kineret will NOT be eligible, even with a wash-out. However, patients with prior or current exposure to biologics directed against T-cells (e.g. alefacept, efalizumab, siplizumab, etc.) will be eligible for enrollment into the study after a wash-out period of 4 weeks before first dose of study drug (baseline visit). It has to be protocol specific also.