I have two computers, one

Question

I have two computers, one with XP professional and one with Vista. I have downloaded an update on the Vista program to use the same printer in both computers. I have a Lexmark Z1400. My computer with XP Professional is a Presario 900Z. It works perfectly with my wireless set up through a Dynex card and Netgear. the new computer is a toshiba laptop with Vista. I have downloaded a netgear connection. Is it related to setting up a network or is thethere some other problem