Help with Scenes

I just got my Vera today and I am having trouble with the scenes area. It seems a little confusing to setup. I tried to setup 1 lamp to go on at 4pm and off at 11pm but when I clicked on save there was a error saving it, which I do not what it is. Can you explain to me how to setup basic timers? If you want a lamp to come on at 4pm and off at 11pm mon-fri do you have to always add a event to a timer? Also how does a command play in to this?