OUTLINE: This is a dose escalation study. Patients receive IM-862 intranasally daily. Treatment continues for 6 months in the absence of unacceptable toxicity or disease progression. At the physician's discretion, further treatment may be given if the patient is still responding after 6 months of treatment. The dose of IM-862 is escalated in cohorts of 10-20 patients until the maximum tolerated dose (MTD) is determined. The MTD is defined as the dose preceding that at which 3 of 10 or 5 of 20 patients experience dose limiting toxicity.