I bought AppleCare with my iMac this morning. It says "auto enroll on it". This might be a stupid question but do I still need to activate it. It came with a CD and I put it in and tried to activate it but I can't find the sheet that has the ## on it (the instructions said there would be a sheet). All that's in my box is a book that looks like it says what it does & does not cover. Loving the mac so far, just wanted to make sure I was covered with my AppleCare.