Web Printer Install With USR5461 Router

I cannot re-install my network printer via the USR web-print server at the URL identified by my USR5461 router page in Win XP SP3 even though it has worked for years. When I try to type in or cut & paste insert the URL for the web print server per USR's instructions, from the router home page, I get an error message that the printer was not found (even if I cut and paste the URL directly from my router's setup home page). The router home page indicates the printer status is "ready". In all other respects the router works fine for home networking and internet.I suspect I may have to manually set up an internet port for the printer but don't know how to do that in XP apparently.