- Any prior chemotherapy therapy is allowed in this protocol. No more than 2 prior cytotoxic chemotherapy regimens are allowed for eligibility. Non-myelotoxic therapies such as sunitinib and sorafenib or everolimus are not considered "cytotoxic chemotherapies".Patients must be greater than or equal to 4 weeks from prior radiation or cytotoxic chemotherapy, except greater than or equal to 6 weeks for mitomycin C and nitrosoureas; greater than or equal to 2 weeks from hormonal therapy; greater than or equal to 4 weeks from prior experimental therapy; greater than or equal to 4 weeks from monoclonal antibody therapy (cetuximab, bevacizumab), greater than or equal to 2 weeks from sorafenib, sunitinib or temsirolimus and greater than or equal to 8 weeks from prior UCN01 treatment. Patients with prostate cancer may continue ongoing LHRH agonist therapy. Patients with bone metastases or hypercalcemia who began intravenous bisphosphonate treatment prior to study entry may continue this treatment.