i got those errors too a time ago @ a customer...
do you get the a big error screen on the UI : "services are not avaible , controller rebooting" ?
03-331 The copy controller cannot communicate with the network controller.
02-321 The user interface has detected that the EIP (Extensible Interface Platform) browser does not respond, or is known to be not working.
22-721 Triple A gets no response from the service registry service.
These are all network related errors , if you have that network error i posted earlier , then change your printers port in windows to lpr printing with gue name LP
That solved it @ our customer..
Also install that latest software... it solves a lot!