I used bootcamp to partition my harddrive. I loaded my xp cd and than got to the point where it asks you if you'd like to: 1. install windows xp; 2. repair xp; or 3. exit. I push enter to install xp, but nothing happens! I've restarted the computer and tried again, but I received the same problem. The computer remains stuck displaying the three options. No matter how many times i push enter nothing happens. What's wrong?