4. Subjects must have ECOG performance status of 0, 1, or 2. 5. Subjects must have adequate hematologic, hepatic, and renal function defined by the following within 4 weeks prior to randomization: Neutrophils > 1500/mm3 and platelets over 100,000/mm3 Total Bilirubin under 1.25 x Institutional upper limit of normal SGPT (ALT) and SGOT (AST) under 2.5 x Institutional upper limit of normal if no demonstrable liver metastases or under 5 x Institutional upper limit of normal in the presence of liver metastases Calculated creatinine clearance over 30ml/min using the following formula: Ccr = (140 - age in years) times (weight in kgs) times 0.085 72 x serum creatinine in mg/dL INR, PT and PTT under 1.5 x Institutional upper limit of normal.