Can you please attach a screen capture of the actual scene that you see inside Poser, and also one of the render itself?

What do you have your render dimensions set at?  You find that under "render" in the tool bar.  Do you have it set to render a specific size or to match the scene window?

"It is good to see ourselves as others see us. Try as we may, we are never
able to know ourselves fully as we are, especially the evil side of us.
This we can do only if we are not angry with our critics but will take in good
heart whatever they might have to say." - Ghandi