I cant figure out why sometimes my screen on my MBP stays in sleep mode when i didn't put it in sleep in the first place...It usually happens when i close my laptop and then open it sometime later..I try and get it out of "sleep" by pressing the keys or adjusting my mouse but when i do it actually activates programs ie. itunes which i can hear but cant see? Is this a malfunction in my MBP or a oversight by me resolving it through the settings?