My 13" i5 MacBook Pro 10.7.1 won't sleep when charging; my machine sleeps just fine, so long as it's not plugged into A/C power.. If I open the lid, my screen is allready illuminated (because it's not been asleep). Any advice? I have already tried: -System Preferences > Energy Saver > Power Adapter > unchecked all the boxes, -reset SMC and PRAM, -repaired permissions, -unchecked "wake for network access" in Preferences > Energy Saver > Power Adapter -turned off internet sharing in System Preferences. -searched forums for solutions, but no luck. Nothing above solved the problem. Maybe you can help me... Thanks a lot.