Network printer problem

Hi there:
My network configuration is as following:
Win2000 ->Win98 -> PrinterA

If on Win2000 from start -> run and then type \\Win98, the printer can be
seen on Win2000. And from start -> settings -> printer and then pint to
PrinterA, it is shown as ready. But when trying printer a test page, it is
shown as "Printer not found on server, unable to connect".
This configuration used to work fine, I didn't change anything, why the
printerA does not work?
I have uninstalled and reinstalled the PrinterA on Win98 as local printer
and on Win2000 as network printer, but the problem still there. If print on
Win98, it is fine, means the printer is working, and the network is fine,
too. If print from Win2000, the print task is shown on both Win98 and
Win2000, but just cannot print anywhere. Anyone can help?
Thanks a lot!
CM