Thanks Gaieus!! You're a life saver!

Thanks! It worked, but why is it that when I export it, it shows the sun light moving through my windows, but when I preview it within sketchup, the sun light is not shown, but only the walls and objects change shade?

How do you animate the movement of the sun in google sketchup so that during the play back, the shadow moves?
I was able to do it before, but after I tried with a new interior model that I created, during the play back, the inside of the room that i'm trying to animate lights up and darkens, but I don't see the shadow move anymore relative to the placement of the sun.

The youtube clip above is exactly what i'm trying to do. I did it before, but for the life of me, I can't figure out how to do it again.

If someone has already posted an answer to this, please direct me to the thread.