LaserWriter 12/640: Error -2804

I have a Power Mac 7300 and a LaserWriter 12/640. I have installed the LaserWriter driver that came on the CD included with the 12/640 and now I get -2804 errors.
Drag the "Printing lib" file (located in the extensions folder) to the trash and re-install the driver from the 12/640 CD.
Alternatively, download the latest LaserWriter driver from the internet.

This article can help you locate the software update mentioned here:
Published Date: Feb 18, 2012