Color StyleWriter 2400: Color Printing in Landscape Mode

I have a Color StyleWriter 2400 and I cannot print color documents in landscape mode. Black and white and grayscale documents print properly in landscape, but when I print in color, the computer locks up after printing approximately eight percent of the job. I am using version 2.1.2 of the Color StyleWriter 2400 driver. What am I doing wrong?
The Color StyleWriter 2400 driver will not print color in landscape mode if virtual memory is active. In order to print color documents in landscape, you can turn off virtual memory, use the Quickdraw GX version of the driver, or use a newer Color StyleWriter 2500 driver. To find the most recent version of this software, please consult the Apple Software Updates Library available at http://www.apple.com/swupdates.
Published Date: Feb 18, 2012