Hi All I have a problem with Poser stalling when working on a hi resolution image

The file is about 180 Meg
The Render is set for production
Firefly on
Use displacement maps set at 0.00
Raytacing on
Cast shadows on
Smooth polygons on
Remove back facing off
Use texture filtering on

the Resolution is set to 200 dpi and the sise is 8"x8"

my PC is a 3 Gig P4 1 gig Ram 128 meg graphics card

it will render if I reduce it down in size but then it looks pixilated when you zoom in
I have succeeded before on oter images

Am I trying to do to much

Regards

Keith