Okay, so I am experiencing something very strange. My macbook wont go to sleep. When I shut the lid, or even click sleep from the menu, the screen and fans shut down, and it appears as it is going to sleep. The indicator light just starts to dim, then you hear the cd drive give a little noise (as if you are turning it on) and goes to the login screen. What would be causing this? I haven't changed any settings recently, so I don't know what it could be. Thanks for any insight.