If you are found to be eligible to take part in this study, you will receive oblimersen by vein over about 1 hour (+/- 5 minutes) on Days 1, 3, and 5 of each 21-day study "cycle." You will receive dexamethasone by vein over about 30 minutes before you receive oblimersen to help prevent side effects. You will take ibuprofen by mouth about 30 minutes before you receive oblimersen.