There are 2 parts to this study. In the first part (Phase I) of this study, researchers will try to find the highest tolerable dose of the study drug combination. In the second part (Phase II) of this study (after the highest tolerable dose is reached), researchers will try to learn the effectiveness of the study drug combination. If you are found to be eligible to take part in this study, you will be enrolled in Phase I or Phase II depending on which part is open at the time.