do you have a system bios password set? you need it to activate sleep on most latitudes... if not you just get a black screen on wake. then in edp run sleep fix. maybe that can makeup for sleep enabler... im not sure of your bios but some have the option in bios that allows you not to have to input password when "waking" from sleep, so only at boot do you need to add a password. great if you dont have to restart every time when sleep works properly.