Eligible patients will be entered in cohorts of three at each dose level. Doses will not be escalated over the course of treatment of an individual patient. If a single patient experiences grade 4 hematologic or ≥ grade 3 non-hematologic toxicity (excluding hyperlipidemia and nausea/vomiting), the next group of three patients will be entered at the same dose. A maximum of 6 evaluable patients will be enrolled at any one dose level. Dose escalation is performed after all patients (3 or 6) at the previous dose level have received treatment for 4 weeks. Treatment will continue until progression of disease, unacceptable adverse effects, or patient refusal. If grade 4 hematologic or ≥ grade 3 non-hematologic toxicity (excluding hyperlipidemia and nausea/vomiting) is observed in two or more patients on dose level 1, the next three patients (or six if similar toxicity develops in one of the first three patients) will receive dose level -1. If such toxicity is seen in two or more patients, the trial will be terminated. We anticipate the maximum accrual of 18 patients to this trial.