I have run into a frustrating problem with my 2 year old white MacBook: When I close the lid or sleep it from the Apple logo, it sleeps for about 5 seconds then wakes up. I hear the hard drive spinning up and the Apple logo light up. It's a very frustrating problem because whenever I want to sleep my computer for a short amount of time, I have to entirely shut it down. Any help would be appreciated, thanks in advance!