Ok this maybe a stupid question but I am trying to use my Macbook in clamshell mode. I have a Samsung external monitor hooked up via DVI and a Bluetooth keyboard and mouse. When I close the Macbook I can't wake it up with the keyboard or mouse. I do have the option in System Pref to wake with Bluetooth device but it will now work. I also have the power cord plugged into the Macbook. I even tried using a USB mouse and I still cannot use the macbook in Clamshell mode. Any thoughts? Thanks.