VISTA – XP HOME NETWORKING PRINTER PROBLEMS

I run window XP Home on my Desktop which acts as my network server. I have 3 HP printers on a wireless network. I have one laptop running XP PRO and I have purchased a new laptop running VISTA. The XPS DELL Laptop with Vista can see all 3 printers but denies me access when I try to add a printer. I have downloaded print drivers for Vista. The laptop running XP PRO recognizes all 3 printers and is working fine.I have connected via USB cable the printers to the laptop with Vista and all printer work fine. What could be causing the message ACCESS DENIED when trying to add a printer to Vista?