Vista x86/64 Network

[1onething]

im trying to setup a home network
i have an x86 laptop, x86 desktop and an x64 desktop
the x86 laptop and x86 laptop can read each other perfectly fine
however none of the x86 computers can connect to the x64 desktop

all three computers are vista
the laptop is home premium while both desktops are ultimate
both computers are wired to a 2wire modem/router
the laptop is wireless off of the 2wire
before upgrading the x64 desktop OS all three computers where connected on the network

also im trying to share my printer on my network, which is on the x64 machine, but when i try to install additional drivers it first asks me to find an autorun.inf (which i found) and than ntprint.inf (x86) which i cant find
i did a computer search and i guess
the only ones that came up were x64 because they did not work

thanks for any help offered

 

[Guest]

Make sure sharing is enabled on the appropriate folders and firewall(s) are off on the machine in question.