AutoCAD 2010 :: Sun Location Settings - North Side Black

I made a model of a small house and I've been trying to figure out how to render it in the best way possible,

I got some good results messing around with the sun location settings.

I've set the location using an google earth file and the house is facing direct east.

when I make a render from the south side with date something like 04-04-2012 at 12:00.

its pretty cool(still a bit dark ish), but if I render from the north the walls are just black.

I've but a simple light bulb in side to see if that would reflect some how but thats no good.

p.s. render time was for each image was about 5m.