If you turn off the firewall, can you ping each other by IP? Or this link
may help.
Vista troubleshootingTroubleshooting Vista Remote Access Issues ...
Networking between Vista and other Windows OS ... Info: Step by step
troubleshooting VISTA sharing ...
www.chicagotech.net/vista/vista.htm
--
Bob Lin, MS-MVP, MCSE & CNE
Networking, Internet, Routing, VPN Troubleshooting on
http://www.ChicagoTech.net
How to Setup Windows, Network, VPN & Remote Access on
http://www.HowToNetworking.com
<(E-Mail Removed)> wrote in message
news:(E-Mail Removed)...
>I have a Vista computer hard-wired to a Linksys 802.11g router, and an
> XP computer using a wireless connection with 128-bit WEP. Both can
> access the Internet, and both are in the same workgroup, but they
> cannot see each other. What settings do I need to change?
>
> TIA,
> Martin