I used Boot Camp to install windows. After using the drag bar to set my desired partition size for mac and windows, The windows installer loaded. In the first stage of installation you are required by windows to choose the partition to install to. The problem here is, All listed partitions have the "Next" button greyed out. Upon clicking the partitions, the "New" buttons is also greyed out, so it seems I cannot even suitable partition. I thought this was the purpose of Boot Camp - To set all this up for you. What do you advise?