Cannot add printer using TE100-P1U from Dell Laptop (Vista)

The utilities that came with the print server install OK, but get an error when attempting to connect to the print server. Same issue - driver loads & finds print server (TE100-P1U) fine, sets IP address (& I can ping p/s ok) but Add Printer in Vista reports "Windows cannot connect to the printer. Make sure that you have typed the name correctly, and that the printer is connected to the network." then returns to the Add Printer window, listing U1 on PS-xxxxxx \\ps-xxxxxx\U1 as (only) network printer to select. Running Vista Home Premium sp1. The PC I'm doing the setup from is connected wireless to a Linksys wireless router; printer is hard-wired to 100Bt port on this router. Ideas?