XP & Vista printer sharing

Trying to share printer connected to XP with my second desktop which is
Vista. Was working fine, but now Vista can't see the net work printer.
Message I'm receiving is "windows cannot connect to printer. make sure that
you typed the name correctly and that the printer is connected to the
If you respond, please do not be too technical "I'm a beancounter" and have
very little IT knowledge. Thanks so much for responding.