In the process of loading parallels to my new Imac, there is a step that calls for selecting "Default CD/DVD-ROM from the devices menu. When I open the devices menu, I have no options that can be selected (all are grayed out). As there is only 1 CD/DVD-ROM drive I attempted to proceed with loading XP. When clicking the "Power On" button, my machine gives me the message that I must restart my computer. After I restart I go through the whole process again without the XP install occurring. What am I missing???