Do you indeed have Poser 6? If so, the above-mentioned link might be appropriate. However, if you don't have Poser 6, I might ask what version do you have? I've had this problem with Poser when on a network. My wife had the printer hooked up to her computer. I'd turn off her computer to save electricity, and Poser would not run because it couldn't find my wife's printer. Poser never said exactly what the problem was. Maybe that applies to you?