Lighting taking some shape

So i'm having some trouble with lighting. It's something none of my classes have gone over exceedingly well.

I try and have light come in through the window to cast the shadows of the boards, but that doesn't work. I place it inside to get a long shadow on the chair, but the fill lights to light the carpet remove that shadow.

Anybody with knowledge of UDK lighting: I will buy you a beer and say nice things about you if you hook me up with some knowledge and/or help.