vista cannot see my wireless laptop

I have a home network using a dlink DI-624 wireless router. I have one
windows 2k machine connected by ethernet and one windows vista connected by
ethernet and one laptop with windows XP connected via wireless. The windows
2k machine can see the laptop and can print to a laser printer connected to
the laptop. The windows vista allowed me to set up the printer but when I
try to print it tells me access denied. What is going on?

Also I have connected my old HP deskjet 540 printer to the vista machine and
there is no driver for this printer. Can it use another driver or is vista
not supporting old printers?

Any help appreciated.