Computer Animation Arts

To finish of my exterior scene and aid in the lighting process i felt is was appropriate to add a sky dome, but i cant get the damn thing to work. As you can see when i render pre skydome, the scene renders with the desired effect, although when i render the scene post skydome, the lighting in the scene decides not to work and i get these weird shadows in the sky, I'm rendering in software with ray trace shadows. Some body help!!!