Add vista computer to xp network

I have an existing network with a pc (windows xp) and a laptop (wireless connection windows xp). It is a Belkin router. The vista computer connects to the internet, but will not connect or even ping the other components (Xerox printer) on the network.

 

Does this thing not work on Saturdays?

 

yes i had file and printer sharing on, but i will double check that

 

everything is on except media sharing
earlier it would ping the other components but now it will not unless I hook an ethernet cable directly to the router

 

I will do that, but it won't ping the router either.

 

still won't ping the pc with firewall turned completely off

 

Are they all on the same workgroup?

 

can't get that far. the network workgroup the other computers are on doesn't show up on vista and i don't have an option to add it. Even though i did install the network with a flash drive to the vista computer