OUTLINE: This is a randomized, multicenter study. Patients are randomized to 1 of 2 treatment arms: Arm I: Patients receive CT-2584 IV over 6 hours daily for 3 days every 3 weeks. Arm II: Patients receive CT-2584 IV over 6 hours once every 7 days for 3 weeks. Courses repeat every 3 weeks in the absence of disease progression or unacceptable toxicity.