In other clinical studies, ON 01910.Na has been safely given intravenously to Patients with advanced cancers. However, to treat some Patients, it may be better if ON 01910.Na could be given by mouth. This study will determine if it is safe to give ON 01910.Na by mouth, what is the highest dose can be safely given by mouth, and how much of the drug gets from the stomach into the blood stream when it is given by mouth.