If you are enrolled in the expansion group, you will also have two mandatory tumor biopsies collected within 1- 7 days before you take your daily dose of the study drug and once during Days 15-21 of Cycle 1. To collect the biopsy, your doctor will insert a needle into the tumor and withdraw a small piece of the tumor. The tumor tissue will be studied to look at special "markers" in the tumor that may help researchers predict who may benefit from the study drug.