OUTLINE: This is a dose escalation study. Patients receive BMS-214662 IV over 1 hour on day -7, followed by oral BMS-214662 daily on days 0-14 for course 1 only. Beginning with course 2, patients receive oral BMS-214662 twice daily for 14 days. Treatment continues every 3 weeks in the absence of disease progression or unacceptable toxicity. Cohorts of 3-6 patients receive escalating doses of BMS-214662 until the maximum tolerated dose (MTD) is determined. The MTD is defined as the dose at which fewer than 2 of 6 patients experience dose limiting toxicity. Patients are followed every 4 weeks until toxicities resolve.