OUTLINE: This is a dose escalation study. Patients receive oral CP-609,754 1-2 times daily. Treatment continues every 28 days for 12 courses in the absence of disease progression or unacceptable toxicity. Cohorts of 3-6 patients receive escalating doses of CP-609,754 until the maximum tolerated dose (MTD) is determined. The MTD is defined as the dose preceding that at which 2 of 3 or 6 patients experience dose limiting toxicities. Patients are followed at 4 weeks.