We have several Kyocera FS-2000D printers.
We are running Windows Server 2008 R2 - all our workstations run Windows XP (32-bit) or Windows 7 (32-bit) .
We recently changed the drivers.
Now any documents sent to the printers result in a single page with this text on it:
PCL XL error
Error: Unsupported Protocol
The driver we are using is: Kyocera FS-2000D DX