vista v/s win xp printer access denied

I am running Vista and cannot access one of the shared printers on my wireless network.I try to access the (win xp) shared printer wirelessly I get an error message, “Cannot Connect To Printer, Access is Denied” I have checked all the user settings (guest accounts, etc.) have turned off all anti-virus and firewalls, and nothing seems to help. ….

PLS HELP!!