Many possibilities. Can you ping the vista by ip? If yes, what do you receive if using "net use \\xpip" command? Or this troubleshooting may help,
Step by step troubleshooting VISTA sharing
1. Make sure you can see each other, for example ping. 2. Make sure you enable file sharing....
Vista Troubleshooting Collections
Vista sharing problem; Vista can't access the Internet; Wireless doesn't work in Vista...
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
"Ralph Smith" <email@example.com> wrote in message news:6DF51BC3-DE92-4C6F-9566-D40C8F2E601B@microsoft.com...
Have Vista Ultimate installed on desktop #1 and can read/share all the files
that are on desktop #2 which is running XP Pro. However, cannot read any
files that are on the Vista machine from the XP Pro machine. Have tried
everything I can think of with no luck. Any suggestions. File sharing,
etc. are all turned on properly.