During the study, you will take your dose of atiprimod orally (by mouth) in tablet or capsule form once a day for 14 days, followed by 14 days with no atiprimod treatment. These 28 days (4 weeks) will make up one treatment "cycle." If you do not experience a serious side effect that forces your doctor to remove you from study, and your cancer is stable or shrinking after 2 months of treatment, you will be eligible to continue on atiprimod treatment for up to 1 year (a total of 12 cycles). If you experience increased blood levels of AST and ALT, and these levels return to normal within 7 days of completing the treatment cycles, you may be eligible to continue atiprimod treatment, but at a lower dose level and on a modified schedule (atiprimod once a day for 7 days, followed by 7 days off atiprimod). You should take the atiprimod in the morning at about the same time each day. You should not eat food for at least 2 hours before and 2 hours after taking atiprimod. You should drink 1 - 2 glasses of water (preferred) or orange juice, soda, tea, or coffee during the 2 hours before and 2 hours after taking your daily dose of atiprimod, and you may drink water (preferred) or orange juice, soda, tea, or coffee during the 2-hour period after taking your daily dose of atiprimod.